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PrimeGrid's Challenge Series

The PrimeGrid Challenge Series is an annual competition based on the results of monthly challenges. The purpose of the Challenge is to spotlight a specific project within PrimeGrid's family of projects as well as to offer a little "healthy" competition for PrimeGrid's participants. It is also an opportunity for people to learn more about each specific project and have fun doing it. Below is a tentative schedule for 2018.

2008 Final Standings
2009 Final Standings
2010 Final Standings
2011 Final Standings
2012 Final Standings
2013 Final Standings
2014 Final Standings
2015 Final Standings
2016 Final Standings
2017 Final Standings

	2018 Challenge Series
	Date	Time UTC	Project(s)	Challenge	Duration	Results
1	1-16 January	00:00:00	SoB-LLR	Happy New Year Challenge	15 days	Individuals \| Teams
2	16-23 March	18:00:00	321-LLR	Year of the Dog Challenge	7 days	Individuals \| Teams
3	3-8 April	12:00:00	ESP-LLR	Mathematics Awareness Month Challenge	5 days	Individuals \| Teams
4	14-19 June	00:00:00	SR5-LLR	World Cup Challenge	5 days	Individuals \| Teams
5	10-13 August	18:00:00	PPS-LLR	Solar Eclipse Challenge	3 days	Individuals \| Teams
6	15-22 September	18:00:00	CUL-LLR	Oktoberfest Challenge	7 days	Individuals \| Teams
7	24-31 October	23:59:59	WOO-LLR	Halloween Challenge	7 days	Individuals \| Teams
8	17-20 November	12:00:00	AP27	Leonids Shower Challenge	3 days	Individuals \| Teams
9	11-21 December	22:23:00	GFN-21	Winter Solstice Challenge	10 days	Individuals \| Teams

	Current Overall Standings

Points will be awarded based on each challenge finish with an annual champion (individual and team) crowned at the end of each year. Challenge points are awarded as follows based on order of finish:

Individual Challenge Points
	Duration of Challenge
Place	3 Day	5 Day	7 Day	10 Day	15 Day
1	1,500.0	2,000.0	2,500.0	3,250.0	3,650.0
2	1,400.0	1,866.7	2,333.3	3,033.3	3,406.7
3	1,300.0	1,733.3	2,166.7	2,816.7	3,163.3
4	1,225.0	1,633.3	2,041.7	2,654.2	2,980.8
5	1,150.0	1,533.3	1,916.7	2,491.7	2,798.3
6	1,075.0	1,433.3	1,791.7	2,329.2	2,615.8
7	1,025.0	1,366.7	1,708.3	2,220.8	2,494.2
8	975.0	1,300.0	1,625.0	2,112.5	2,372.5
9	925.0	1,233.3	1,541.7	2,004.2	2,250.8
10	900.0	1,200.0	1,500.0	1,950.0	2,190.0
11	875.0	1,166.7	1,458.3	1,895.8	2,129.2
12	850.0	1,133.3	1,416.7	1,841.7	2,068.3
13	835.0	1,113.3	1,391.7	1,809.2	2,031.8
14	820.0	1,093.3	1,366.7	1,776.7	1,995.3
15	805.0	1,073.3	1,341.7	1,744.2	1,958.8
16	790.0	1,053.3	1,316.7	1,711.7	1,922.3
17	775.0	1,033.3	1,291.7	1,679.2	1,885.8
18	765.0	1,020.0	1,275.0	1,657.5	1,861.5
19	755.0	1,006.7	1,258.3	1,635.8	1,837.2
20	745.0	993.3	1,241.7	1,614.2	1,812.8
21	735.0	980.0	1,225.0	1,592.5	1,788.5
22	725.0	966.7	1,208.3	1,570.8	1,764.2
23	715.0	953.3	1,191.7	1,549.2	1,739.8
24	705.0	940.0	1,175.0	1,527.5	1,715.5
25	695.0	926.7	1,158.3	1,505.8	1,691.2
26	685.0	913.3	1,141.7	1,484.2	1,666.8
27	675.0	900.0	1,125.0	1,462.5	1,642.5
28	670.0	893.3	1,116.7	1,451.7	1,630.3
29	665.0	886.7	1,108.3	1,440.8	1,618.2
30	660.0	880.0	1,100.0	1,430.0	1,606.0
31	655.0	873.3	1,091.7	1,419.2	1,593.8
32	650.0	866.7	1,083.3	1,408.3	1,581.7
33	645.0	860.0	1,075.0	1,397.5	1,569.5
34	640.0	853.3	1,066.7	1,386.7	1,557.3
35	635.0	846.7	1,058.3	1,375.8	1,545.2
36	630.0	840.0	1,050.0	1,365.0	1,533.0
37	625.0	833.3	1,041.7	1,354.2	1,520.8
38	620.0	826.7	1,033.3	1,343.3	1,508.7
39	615.0	820.0	1,025.0	1,332.5	1,496.5
40	610.0	813.3	1,016.7	1,321.7	1,484.3
41	605.0	806.7	1,008.3	1,310.8	1,472.2
42	600.0	800.0	1,000.0	1,300.0	1,460.0
43	596.0	794.7	993.3	1,291.3	1,450.3
44	592.0	789.3	986.7	1,282.7	1,440.5
45	588.0	784.0	980.0	1,274.0	1,430.8
46	584.0	778.7	973.3	1,265.3	1,421.1
47	580.0	773.3	966.7	1,256.7	1,411.3
48	576.0	768.0	960.0	1,248.0	1,401.6
49	572.0	762.7	953.3	1,239.3	1,391.9
50	568.0	757.3	946.7	1,230.7	1,382.1
51	564.0	752.0	940.0	1,222.0	1,372.4
52	560.0	746.7	933.3	1,213.3	1,362.7
53	556.0	741.3	926.7	1,204.7	1,352.9
54	552.0	736.0	920.0	1,196.0	1,343.2
55	548.0	730.7	913.3	1,187.3	1,333.5
56	544.0	725.3	906.7	1,178.7	1,323.7
57	540.0	720.0	900.0	1,170.0	1,314.0
58	536.0	714.7	893.3	1,161.3	1,304.3
59	532.0	709.3	886.7	1,152.7	1,294.5
60	528.0	704.0	880.0	1,144.0	1,284.8
61	524.0	698.7	873.3	1,135.3	1,275.1
62	520.0	693.3	866.7	1,126.7	1,265.3
63	516.0	688.0	860.0	1,118.0	1,255.6
64	512.0	682.7	853.3	1,109.3	1,245.9
65	508.0	677.3	846.7	1,100.7	1,236.1
66	504.0	672.0	840.0	1,092.0	1,226.4
67	500.5	667.3	834.2	1,084.4	1,217.9
68	497.0	662.7	828.3	1,076.8	1,209.4
69	493.5	658.0	822.5	1,069.3	1,200.9
70	490.0	653.3	816.7	1,061.7	1,192.3
71	486.5	648.7	810.8	1,054.1	1,183.8
72	483.0	644.0	805.0	1,046.5	1,175.3
73	479.5	639.3	799.2	1,038.9	1,166.8
74	476.0	634.7	793.3	1,031.3	1,158.3
75	472.5	630.0	787.5	1,023.8	1,149.8
76	469.0	625.3	781.7	1,016.2	1,141.2
77	465.5	620.7	775.8	1,008.6	1,132.7
78	462.0	616.0	770.0	1,001.0	1,124.2
79	458.5	611.3	764.2	993.4	1,115.7
80	455.0	606.7	758.3	985.8	1,107.2
81	451.5	602.0	752.5	978.2	1,098.7
82	448.0	597.3	746.7	970.7	1,090.1
83	444.5	592.7	740.8	963.1	1,081.6
84	441.0	588.0	735.0	955.5	1,073.1
85	437.5	583.3	729.2	947.9	1,064.6
86	434.0	578.7	723.3	940.3	1,056.1
87	430.5	574.0	717.5	932.7	1,047.6
88	427.0	569.3	711.7	925.2	1,039.0
89	423.5	564.7	705.8	917.6	1,030.5
90	420.0	560.0	700.0	910.0	1,022.0
91	416.5	555.3	694.2	902.4	1,013.5
92	413.0	550.7	688.3	894.8	1,005.0
93	409.5	546.0	682.5	887.3	996.5
94	406.0	541.3	676.7	879.7	987.9
95	402.5	536.7	670.8	872.1	979.4
96	399.0	532.0	665.0	864.5	970.9
97	395.5	527.3	659.2	856.9	962.4
98	392.5	523.3	654.2	850.4	955.1
99	389.5	519.3	649.2	843.9	947.8
100	386.5	515.3	644.2	837.4	940.5
101	383.5	511.3	639.2	830.9	933.2
102	380.5	507.3	634.2	824.4	925.9
103	377.5	503.3	629.2	817.9	918.6
104	374.5	499.3	624.2	811.4	911.3
105	371.5	495.3	619.2	804.9	904.0
106	368.5	491.3	614.2	798.4	896.7
107	365.5	487.3	609.2	791.9	889.4
108	362.5	483.3	604.2	785.4	882.1
109	359.5	479.3	599.2	778.9	874.8
110	356.5	475.3	594.2	772.4	867.5
111	353.5	471.3	589.2	765.9	860.2
112	350.5	467.3	584.2	759.4	852.9
113	347.5	463.3	579.2	752.9	845.6
114	344.5	459.3	574.2	746.4	838.3
115	341.5	455.3	569.2	739.9	831.0
116	338.5	451.3	564.2	733.4	823.7
117	335.5	447.3	559.2	726.9	816.4
118	332.5	443.3	554.2	720.4	809.1
119	329.5	439.3	549.2	713.9	801.8
120	326.5	435.3	544.2	707.4	794.5
121	323.5	431.3	539.2	700.9	787.2
122	320.5	427.3	534.2	694.4	779.9
123	317.5	423.3	529.2	687.9	772.6
124	314.5	419.3	524.2	681.4	765.3
125	311.5	415.3	519.2	674.9	758.0
126	308.5	411.3	514.2	668.4	750.7
127	305.5	407.3	509.2	661.9	743.4
128	302.5	403.3	504.2	655.4	736.1
129	299.5	399.3	499.2	648.9	728.8
130	296.5	395.3	494.2	642.4	721.5
131	293.5	391.3	489.2	635.9	714.2
132	290.5	387.3	484.2	629.4	706.9
133	288.0	384.0	480.0	624.0	700.8
134	285.5	380.7	475.8	618.6	694.7
135	283.0	377.3	471.7	613.2	688.6
136	280.5	374.0	467.5	607.8	682.6
137	278.0	370.7	463.3	602.3	676.5
138	275.5	367.3	459.2	596.9	670.4
139	273.0	364.0	455.0	591.5	664.3
140	270.5	360.7	450.8	586.1	658.2
141	268.0	357.3	446.7	580.7	652.1
142	265.5	354.0	442.5	575.3	646.0
143	263.0	350.7	438.3	569.8	640.0
144	260.5	347.3	434.2	564.4	633.9
145	258.0	344.0	430.0	559.0	627.8
146	255.5	340.7	425.8	553.6	621.7
147	253.0	337.3	421.7	548.2	615.6
148	250.5	334.0	417.5	542.8	609.5
149	248.0	330.7	413.3	537.3	603.5
150	245.5	327.3	409.2	531.9	597.4
151	243.0	324.0	405.0	526.5	591.3
152	240.5	320.7	400.8	521.1	585.2
153	238.0	317.3	396.7	515.7	579.1
154	235.5	314.0	392.5	510.3	573.0
155	233.0	310.7	388.3	504.8	567.0
156	230.5	307.3	384.2	499.4	560.9
157	228.0	304.0	380.0	494.0	554.8
158	225.5	300.7	375.8	488.6	548.7
159	223.0	297.3	371.7	483.2	542.6
160	220.5	294.0	367.5	477.8	536.5
161	218.0	290.7	363.3	472.3	530.5
162	215.5	287.3	359.2	466.9	524.4
163	213.0	284.0	355.0	461.5	518.3
164	210.5	280.7	350.8	456.1	512.2
165	208.0	277.3	346.7	450.7	506.1
166	205.5	274.0	342.5	445.3	500.0
167	203.0	270.7	338.3	439.8	494.0
168	200.5	267.3	334.2	434.4	487.9
169	198.0	264.0	330.0	429.0	481.8
170	196.0	261.3	326.7	424.7	476.9
171	194.0	258.7	323.3	420.3	472.1
172	192.0	256.0	320.0	416.0	467.2
173	190.0	253.3	316.7	411.7	462.3
174	188.0	250.7	313.3	407.3	457.5
175	186.0	248.0	310.0	403.0	452.6
176	184.0	245.3	306.7	398.7	447.7
177	182.0	242.7	303.3	394.3	442.9
178	180.0	240.0	300.0	390.0	438.0
179	178.0	237.3	296.7	385.7	433.1
180	176.0	234.7	293.3	381.3	428.3
181	174.0	232.0	290.0	377.0	423.4
182	172.0	229.3	286.7	372.7	418.5
183	170.0	226.7	283.3	368.3	413.7
184	168.0	224.0	280.0	364.0	408.8
185	166.0	221.3	276.7	359.7	403.9
186	164.0	218.7	273.3	355.3	399.1
187	162.0	216.0	270.0	351.0	394.2
188	160.0	213.3	266.7	346.7	389.3
189	158.0	210.7	263.3	342.3	384.5
190	156.0	208.0	260.0	338.0	379.6
191	154.0	205.3	256.7	333.7	374.7
192	152.0	202.7	253.3	329.3	369.9
193	150.0	200.0	250.0	325.0	365.0
194	148.0	197.3	246.7	320.7	360.1
195	146.0	194.7	243.3	316.3	355.3
196	144.0	192.0	240.0	312.0	350.4
197	142.0	189.3	236.7	307.7	345.5
198	140.0	186.7	233.3	303.3	340.7
199	138.0	184.0	230.0	299.0	335.8
200	136.0	181.3	226.7	294.7	330.9
201	134.0	178.7	223.3	290.3	326.1
202	132.0	176.0	220.0	286.0	321.2
203	130.0	173.3	216.7	281.7	316.3
204	128.0	170.7	213.3	277.3	311.5
205	126.0	168.0	210.0	273.0	306.6
206	124.5	166.0	207.5	269.8	303.0
207	123.0	164.0	205.0	266.5	299.3
208	121.5	162.0	202.5	263.3	295.7
209	120.0	160.0	200.0	260.0	292.0
210	118.5	158.0	197.5	256.8	288.4
211	117.0	156.0	195.0	253.5	284.7
212	115.5	154.0	192.5	250.3	281.1
213	114.0	152.0	190.0	247.0	277.4
214	112.5	150.0	187.5	243.8	273.8
215	111.0	148.0	185.0	240.5	270.1
216	109.5	146.0	182.5	237.3	266.5
217	108.0	144.0	180.0	234.0	262.8
218	106.5	142.0	177.5	230.8	259.2
219	105.0	140.0	175.0	227.5	255.5
220	103.5	138.0	172.5	224.3	251.9
221	102.0	136.0	170.0	221.0	248.2
222	100.5	134.0	167.5	217.8	244.6
223	99.0	132.0	165.0	214.5	240.9
224	97.5	130.0	162.5	211.3	237.3
225	96.0	128.0	160.0	208.0	233.6
226	94.5	126.0	157.5	204.8	230.0
227	93.0	124.0	155.0	201.5	226.3
228	91.5	122.0	152.5	198.3	222.7
229	90.0	120.0	150.0	195.0	219.0
230	88.5	118.0	147.5	191.8	215.4
231	87.0	116.0	145.0	188.5	211.7
232	85.5	114.0	142.5	185.3	208.1
233	84.0	112.0	140.0	182.0	204.4
234	82.5	110.0	137.5	178.8	200.8
235	81.0	108.0	135.0	175.5	197.1
236	79.5	106.0	132.5	172.3	193.5
237	78.0	104.0	130.0	169.0	189.8
238	76.5	102.0	127.5	165.8	186.2
239	75.0	100.0	125.0	162.5	182.5
240	73.5	98.0	122.5	159.3	178.9
241	72.0	96.0	120.0	156.0	175.2
242	70.5	94.0	117.5	152.8	171.6
243	69.0	92.0	115.0	149.5	167.9
244	67.5	90.0	112.5	146.3	164.3
245	66.0	88.0	110.0	143.0	160.6
246	64.5	86.0	107.5	139.8	157.0
247	63.0	84.0	105.0	136.5	153.3
248	62.0	82.7	103.3	134.3	150.9
249	61.0	81.3	101.7	132.2	148.4
250	60.0	80.0	100.0	130.0	146.0
251	59.0	78.7	98.3	127.8	143.6
252	58.0	77.3	96.7	125.7	141.1
253	57.0	76.0	95.0	123.5	138.7
254	56.0	74.7	93.3	121.3	136.3
255	55.0	73.3	91.7	119.2	133.8
256	54.0	72.0	90.0	117.0	131.4
257	53.0	70.7	88.3	114.8	129.0
258	52.0	69.3	86.7	112.7	126.5
259	51.0	68.0	85.0	110.5	124.1
260	50.0	66.7	83.3	108.3	121.7
261	49.0	65.3	81.7	106.2	119.2
262	48.0	64.0	80.0	104.0	116.8
263	47.0	62.7	78.3	101.8	114.4
264	46.0	61.3	76.7	99.7	111.9
265	45.0	60.0	75.0	97.5	109.5
266	44.0	58.7	73.3	95.3	107.1
267	43.0	57.3	71.7	93.2	104.6
268	42.0	56.0	70.0	91.0	102.2
269	41.0	54.7	68.3	88.8	99.8
270	40.0	53.3	66.7	86.7	97.3
271	39.0	52.0	65.0	84.5	94.9
272	38.0	50.7	63.3	82.3	92.5
273	37.0	49.3	61.7	80.2	90.0
274	36.0	48.0	60.0	78.0	87.6
275	35.0	46.7	58.3	75.8	85.2
276	34.0	45.3	56.7	73.7	82.7
277	33.0	44.0	55.0	71.5	80.3
278	32.0	42.7	53.3	69.3	77.9
279	31.0	41.3	51.7	67.2	75.4
280	30.0	40.0	50.0	65.0	73.0
281	29.0	38.7	48.3	62.8	70.6
282	28.0	37.3	46.7	60.7	68.1
283	27.0	36.0	45.0	58.5	65.7
284	26.0	34.7	43.3	56.3	63.3
285	25.0	33.3	41.7	54.2	60.8
286	24.0	32.0	40.0	52.0	58.4
287	23.0	30.7	38.3	49.8	56.0
288	22.0	29.3	36.7	47.7	53.5
289	21.0	28.0	35.0	45.5	51.1
290	20.0	26.7	33.3	43.3	48.7
291	19.0	25.3	31.7	41.2	46.2
292	18.0	24.0	30.0	39.0	43.8
293	17.0	22.7	28.3	36.8	41.4
294	16.0	21.3	26.7	34.7	38.9
295	15.0	20.0	25.0	32.5	36.5
296	14.0	18.7	23.3	30.3	34.1
297	13.0	17.3	21.7	28.2	31.6
298	12.0	16.0	20.0	26.0	29.2
299	11.0	14.7	18.3	23.8	26.8
300	10.0	13.3	16.7	21.7	24.3

Team Challenge Points
	Duration of Challenge
Place	3 Day	5 Days	7 Days	10 Days	15 Days
1	500.0	625.0	750.0	1,000.0	1,125.0
2	480.0	600.0	720.0	960.0	1,080.0
3	460.0	575.0	690.0	920.0	1,035.0
4	445.0	556.3	667.5	890.0	1,001.3
5	430.0	537.5	645.0	860.0	967.5
6	415.0	518.8	622.5	830.0	933.8
7	400.0	500.0	600.0	800.0	900.0
8	385.0	481.3	577.5	770.0	866.3
9	370.0	462.5	555.0	740.0	832.5
10	360.0	450.0	540.0	720.0	810.0
11	350.0	437.5	525.0	700.0	787.5
12	340.0	425.0	510.0	680.0	765.0
13	330.0	412.5	495.0	660.0	742.5
14	320.0	400.0	480.0	640.0	720.0
15	310.0	387.5	465.0	620.0	697.5
16	300.0	375.0	450.0	600.0	675.0
17	290.0	362.5	435.0	580.0	652.5
18	280.0	350.0	420.0	560.0	630.0
19	270.0	337.5	405.0	540.0	607.5
20	263.0	328.8	394.5	526.0	591.8
21	256.0	320.0	384.0	512.0	576.0
22	249.0	311.3	373.5	498.0	560.3
23	242.0	302.5	363.0	484.0	544.5
24	235.0	293.8	352.5	470.0	528.8
25	228.0	285.0	342.0	456.0	513.0
26	221.0	276.3	331.5	442.0	497.3
27	214.0	267.5	321.0	428.0	481.5
28	207.0	258.8	310.5	414.0	465.8
29	200.0	250.0	300.0	400.0	450.0
30	193.0	241.3	289.5	386.0	434.3
31	186.0	232.5	279.0	372.0	418.5
32	179.0	223.8	268.5	358.0	402.8
33	172.0	215.0	258.0	344.0	387.0
34	167.0	208.8	250.5	334.0	375.8
35	162.0	202.5	243.0	324.0	364.5
36	157.0	196.3	235.5	314.0	353.3
37	152.0	190.0	228.0	304.0	342.0
38	147.0	183.8	220.5	294.0	330.8
39	142.0	177.5	213.0	284.0	319.5
40	137.0	171.3	205.5	274.0	308.3
41	132.0	165.0	198.0	264.0	297.0
42	127.0	158.8	190.5	254.0	285.8
43	122.0	152.5	183.0	244.0	274.5
44	117.0	146.3	175.5	234.0	263.3
45	112.0	140.0	168.0	224.0	252.0
46	107.0	133.8	160.5	214.0	240.8
47	102.0	127.5	153.0	204.0	229.5
48	99.0	123.8	148.5	198.0	222.8
49	96.0	120.0	144.0	192.0	216.0
50	93.0	116.3	139.5	186.0	209.3
51	90.0	112.5	135.0	180.0	202.5
52	87.0	108.8	130.5	174.0	195.8
53	84.0	105.0	126.0	168.0	189.0
54	81.0	101.3	121.5	162.0	182.3
55	78.0	97.5	117.0	156.0	175.5
56	75.0	93.8	112.5	150.0	168.8
57	72.0	90.0	108.0	144.0	162.0
58	69.0	86.3	103.5	138.0	155.3
59	66.0	82.5	99.0	132.0	148.5
60	63.0	78.8	94.5	126.0	141.8
61	61.0	76.3	91.5	122.0	137.3
62	59.0	73.8	88.5	118.0	132.8
63	57.0	71.3	85.5	114.0	128.3
64	55.0	68.8	82.5	110.0	123.8
65	53.0	66.3	79.5	106.0	119.3
66	51.0	63.8	76.5	102.0	114.8
67	49.0	61.3	73.5	98.0	110.3
68	47.0	58.8	70.5	94.0	105.8
69	45.0	56.3	67.5	90.0	101.3
70	43.0	53.8	64.5	86.0	96.8
71	41.0	51.3	61.5	82.0	92.3
72	39.0	48.8	58.5	78.0	87.8
73	37.0	46.3	55.5	74.0	83.3
74	35.0	43.8	52.5	70.0	78.8
75	33.0	41.3	49.5	66.0	74.3
76	31.0	38.8	46.5	62.0	69.8
77	29.0	36.3	43.5	58.0	65.3
78	27.0	33.8	40.5	54.0	60.8
79	25.0	31.3	37.5	50.0	56.3
80	23.0	28.8	34.5	46.0	51.8
81	21.0	26.3	31.5	42.0	47.3
82	19.0	25.0	30.0	40.0	45.0
83	18.0	23.8	28.5	38.0	42.8
84	17.0	22.5	27.0	36.0	40.5
85	16.0	21.3	25.5	34.0	38.3
86	15.0	20.0	24.0	32.0	36.0
87	14.0	18.8	22.5	30.0	33.8
88	13.0	17.5	21.0	28.0	31.5
89	12.0	16.3	19.5	26.0	29.3
90	11.0	15.0	18.0	24.0	27.0
91	10.0	13.8	16.5	22.0	24.8
92	9.0	12.5	15.0	20.0	22.5
93	8.0	11.3	13.5	18.0	20.3
94	7.0	10.0	12.0	16.0	18.0
95	6.0	8.8	10.5	14.0	15.8
96	5.0	7.5	9.0	12.0	13.5
97	4.0	6.3	7.5	10.0	11.3
98	3.0	5.0	6.0	8.0	9.0
99	2.0	3.8	4.5	6.0	6.8
100	1.0	2.5	3.0	4.0	4.5