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Message boards : General discussion : Happy Palindrome Day!

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Nita
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Joined: 14 Dec 18
Posts: 25
ID: 1085395
Credit: 717,650,994
RAC: 25,029
Discovered 2 mega primesFound 1 prime in the 2020 Tour de PrimesFound 1 mega prime in the 2020 Tour de Primes321 LLR Gold: Earned 500,000 credits (509,887)ESP LLR Gold: Earned 500,000 credits (522,663)PPS LLR Jade: Earned 10,000,000 credits (10,639,934)PSP LLR Amethyst: Earned 1,000,000 credits (1,830,002)SoB LLR Gold: Earned 500,000 credits (554,530)SR5 LLR Gold: Earned 500,000 credits (516,489)SGS LLR Sapphire: Earned 20,000,000 credits (36,778,666)TRP LLR Gold: Earned 500,000 credits (506,222)321 Sieve (suspended) Ruby: Earned 2,000,000 credits (2,238,888)Generalized Cullen/Woodall Sieve (suspended) Gold: Earned 500,000 credits (501,355)PPS Sieve Sapphire: Earned 20,000,000 credits (21,341,801)AP 26/27 Sapphire: Earned 20,000,000 credits (20,008,807)GFN Double Gold: Earned 500,000,000 credits (621,701,831)
Message 137067 - Posted: 1 Feb 2020 | 18:37:52 UTC

Tomorrow's date is 02022020! A palindrome! How often does a thing like this happen?

Profile NickProject donor
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Joined: 11 Jul 11
Posts: 1955
ID: 105020
Credit: 5,617,569,115
RAC: 25,291,768
Discovered 9 mega primesFound 5 primes in the 2020 Tour de PrimesFound 2 mega primes in the 2020 Tour de PrimesFound 4 primes in the 2021 Tour de PrimesFound 2 mega primes in the 2021 Tour de PrimesFound 3 primes in the 2022 Tour de Primes321 LLR Sapphire: Earned 20,000,000 credits (42,905,896)Cullen LLR Emerald: Earned 50,000,000 credits (50,743,293)ESP LLR Emerald: Earned 50,000,000 credits (50,849,415)Generalized Cullen/Woodall LLR Emerald: Earned 50,000,000 credits (50,473,530)PPS LLR Emerald: Earned 50,000,000 credits (78,166,592)PSP LLR Emerald: Earned 50,000,000 credits (51,069,305)SoB LLR Emerald: Earned 50,000,000 credits (51,885,310)SR5 LLR Emerald: Earned 50,000,000 credits (50,409,361)SGS LLR Sapphire: Earned 20,000,000 credits (20,482,069)TRP LLR Sapphire: Earned 20,000,000 credits (20,307,419)Woodall LLR Emerald: Earned 50,000,000 credits (51,058,101)321 Sieve (suspended) Sapphire: Earned 20,000,000 credits (20,380,527)Cullen/Woodall Sieve (suspended) Gold: Earned 500,000 credits (744,531)Generalized Cullen/Woodall Sieve (suspended) Turquoise: Earned 5,000,000 credits (5,007,004)PPS Sieve Double Gold: Earned 500,000,000 credits (636,387,711)TRP Sieve (suspended) Bronze: Earned 10,000 credits (21,181)AP 26/27 Emerald: Earned 50,000,000 credits (50,339,393)GFN Double Gold: Earned 500,000,000 credits (591,721,141)WW Double Ruby: Earned 2,000,000,000 credits (3,795,300,000)
Message 137068 - Posted: 1 Feb 2020 | 18:41:57 UTC - in response to Message 137067.

Tomorrow's date is 02022020! A palindrome! How often does a thing like this happen?

And it is groundhog day!
Best to fill the day with good things on the off-chance you get stuck there.

Kellen
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Joined: 10 Jan 18
Posts: 484
ID: 967938
Credit: 1,600,003,090
RAC: 2
Discovered 2 mega primes321 LLR Sapphire: Earned 20,000,000 credits (20,008,344)Cullen LLR Sapphire: Earned 20,000,000 credits (20,000,917)ESP LLR Sapphire: Earned 20,000,000 credits (20,001,144)Generalized Cullen/Woodall LLR Sapphire: Earned 20,000,000 credits (20,011,942)PPS LLR Sapphire: Earned 20,000,000 credits (20,000,023)PSP LLR Sapphire: Earned 20,000,000 credits (20,008,714)SoB LLR Sapphire: Earned 20,000,000 credits (20,035,621)SR5 LLR Sapphire: Earned 20,000,000 credits (20,004,459)SGS LLR Sapphire: Earned 20,000,000 credits (20,000,002)TRP LLR Sapphire: Earned 20,000,000 credits (20,000,236)Woodall LLR Sapphire: Earned 20,000,000 credits (20,017,137)321 Sieve (suspended) Sapphire: Earned 20,000,000 credits (20,000,569)Generalized Cullen/Woodall Sieve (suspended) Sapphire: Earned 20,000,000 credits (20,006,424)PPS Sieve Sapphire: Earned 20,000,000 credits (49,900,913)AP 26/27 Sapphire: Earned 20,000,000 credits (45,002,633)GFN Double Silver: Earned 200,000,000 credits (200,000,012)WW Sapphire: Earned 20,000,000 credits (45,004,000)PSA Double Amethyst: Earned 1,000,000,000 credits (1,000,000,000)
Message 137069 - Posted: 1 Feb 2020 | 18:46:58 UTC - in response to Message 137067.

Tomorrow's date is 02022020! A palindrome! How often does a thing like this happen?


Nice catch! I think the next one will be 12022021, then 22022022 (assuming you use ddmmyyyy and not mmddyyyy), but after that I think the next one is 03022030, so they are definitely quite sparse!

If I have missed any, please post. Now I want to mark these on the calendar :)

Ken_g6Project donor
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Joined: 4 Jul 06
Posts: 929
ID: 3110
Credit: 236,594,205
RAC: 10,765
Discovered 1 mega primeFound 2 primes in the 2018 Tour de PrimesFound 1 prime in the 2019 Tour de PrimesFound 1 prime in the 2020 Tour de PrimesFound 1 prime in the 2021 Tour de PrimesFound 3 primes in the 2022 Tour de Primes321 LLR Ruby: Earned 2,000,000 credits (2,148,133)Cullen LLR Ruby: Earned 2,000,000 credits (2,022,806)ESP LLR Amethyst: Earned 1,000,000 credits (1,657,625)Generalized Cullen/Woodall LLR Amethyst: Earned 1,000,000 credits (1,251,083)PPS LLR Sapphire: Earned 20,000,000 credits (28,493,981)PSP LLR Turquoise: Earned 5,000,000 credits (5,182,638)SoB LLR Turquoise: Earned 5,000,000 credits (5,923,035)SR5 LLR Ruby: Earned 2,000,000 credits (2,603,308)SGS LLR Ruby: Earned 2,000,000 credits (2,139,194)TPS LLR (retired) Bronze: Earned 10,000 credits (19,376)TRP LLR Ruby: Earned 2,000,000 credits (2,520,745)Woodall LLR Ruby: Earned 2,000,000 credits (2,021,413)321 Sieve (suspended) Ruby: Earned 2,000,000 credits (2,915,071)Cullen/Woodall Sieve (suspended) Turquoise: Earned 5,000,000 credits (8,584,236)Generalized Cullen/Woodall Sieve (suspended) Ruby: Earned 2,000,000 credits (2,461,309)PPS Sieve Emerald: Earned 50,000,000 credits (97,322,801)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Silver: Earned 100,000 credits (352,129)TRP Sieve (suspended) Gold: Earned 500,000 credits (776,202)AP 26/27 Turquoise: Earned 5,000,000 credits (6,368,553)GFN Sapphire: Earned 20,000,000 credits (40,451,682)WW Jade: Earned 10,000,000 credits (17,224,000)PSA Ruby: Earned 2,000,000 credits (4,154,617)
Message 137071 - Posted: 1 Feb 2020 | 18:48:18 UTC - in response to Message 137068.

Tomorrow's date is 02022020! A palindrome! How often does a thing like this happen?

And it is groundhog day!
Best to fill the day with good things on the off-chance you get stuck there.

It's also a Superb Owl Sunday!

(Did I spell that right? ;))

Dr Who Fan
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Joined: 26 Sep 06
Posts: 177
ID: 3556
Credit: 24,881,897
RAC: 7,879
321 LLR Silver: Earned 100,000 credits (186,168)Cullen LLR Silver: Earned 100,000 credits (189,022)ESP LLR Silver: Earned 100,000 credits (128,326)Generalized Cullen/Woodall LLR Silver: Earned 100,000 credits (115,730)PPS LLR Amethyst: Earned 1,000,000 credits (1,950,250)PSP LLR Silver: Earned 100,000 credits (132,546)SoB LLR Silver: Earned 100,000 credits (433,700)SR5 LLR Silver: Earned 100,000 credits (155,859)SGS LLR Silver: Earned 100,000 credits (167,333)TRP LLR Silver: Earned 100,000 credits (100,020)Woodall LLR Silver: Earned 100,000 credits (103,446)321 Sieve (suspended) Ruby: Earned 2,000,000 credits (2,006,012)Generalized Cullen/Woodall Sieve (suspended) Ruby: Earned 2,000,000 credits (2,740,001)PPS Sieve Turquoise: Earned 5,000,000 credits (5,282,493)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Silver: Earned 100,000 credits (119,708)TRP Sieve (suspended) Gold: Earned 500,000 credits (527,925)AP 26/27 Ruby: Earned 2,000,000 credits (2,664,419)GFN Ruby: Earned 2,000,000 credits (2,752,547)WW Turquoise: Earned 5,000,000 credits (5,112,000)
Message 137073 - Posted: 1 Feb 2020 | 19:10:08 UTC

Maybe we can find a record number of and / or odd chance of world's largest prime tomorrow?
____________

Profile DaveProject donor
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Joined: 13 Feb 12
Posts: 3062
ID: 130544
Credit: 2,115,036,724
RAC: 1,458,454
Found 2 primes in the 2018 Tour de PrimesFound 1 prime in the 2020 Tour de Primes321 LLR Jade: Earned 10,000,000 credits (10,087,388)Cullen LLR Jade: Earned 10,000,000 credits (10,317,185)ESP LLR Jade: Earned 10,000,000 credits (10,172,211)Generalized Cullen/Woodall LLR Jade: Earned 10,000,000 credits (10,209,354)PPS LLR Jade: Earned 10,000,000 credits (10,660,163)PSP LLR Jade: Earned 10,000,000 credits (10,201,555)SoB LLR Jade: Earned 10,000,000 credits (10,760,496)SR5 LLR Jade: Earned 10,000,000 credits (11,015,905)SGS LLR Jade: Earned 10,000,000 credits (10,046,746)TRP LLR Jade: Earned 10,000,000 credits (10,101,369)Woodall LLR Jade: Earned 10,000,000 credits (10,353,360)321 Sieve (suspended) Jade: Earned 10,000,000 credits (10,003,334)Cullen/Woodall Sieve (suspended) Silver: Earned 100,000 credits (268,250)Generalized Cullen/Woodall Sieve (suspended) Jade: Earned 10,000,000 credits (10,000,502)PPS Sieve Double Silver: Earned 200,000,000 credits (310,223,017)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Jade: Earned 10,000,000 credits (10,000,133)TRP Sieve (suspended) Jade: Earned 10,000,000 credits (10,000,970)AP 26/27 Double Silver: Earned 200,000,000 credits (206,395,150)GFN Double Silver: Earned 200,000,000 credits (204,159,637)WW Double Amethyst: Earned 1,000,000,000 credits (1,040,192,000)PSA Double Silver: Earned 200,000,000 credits (200,000,001)
Message 137074 - Posted: 1 Feb 2020 | 19:52:17 UTC
Last modified: 1 Feb 2020 | 19:58:23 UTC

LMAO at Superb Owl - that's what I call it too!

Yes I personally use ISO8601 YYYYMMDD so it is 20200202. The last was 20111102, the next 20211202. However these comprise 3 different numbers. 20200202 is just 2 different numbers. The last date to feature just 2 different numbers.........was 12211221. The next.........is 21111112.

So yes, super rare.

Profile Pooh Bear 27Project donor
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Joined: 10 May 09
Posts: 787
ID: 39821
Credit: 1,457,424,185
RAC: 1,613,920
Discovered 2 mega primesEliminated 1 conjecture "k"Discovered 1 twin prime2022 Tour de Primes largest primeFound 1 prime in the 2022 Tour de PrimesFound 1 mega prime in the 2022 Tour de Primes321 LLR Turquoise: Earned 5,000,000 credits (5,709,103)Cullen LLR Turquoise: Earned 5,000,000 credits (7,681,452)ESP LLR Turquoise: Earned 5,000,000 credits (5,421,149)Generalized Cullen/Woodall LLR Jade: Earned 10,000,000 credits (10,267,839)PPS LLR Sapphire: Earned 20,000,000 credits (24,198,975)PSP LLR Jade: Earned 10,000,000 credits (12,783,817)SoB LLR Jade: Earned 10,000,000 credits (13,332,361)SR5 LLR Turquoise: Earned 5,000,000 credits (5,248,659)SGS LLR Turquoise: Earned 5,000,000 credits (6,878,856)TRP LLR Jade: Earned 10,000,000 credits (11,153,506)Woodall LLR Turquoise: Earned 5,000,000 credits (9,224,032)321 Sieve (suspended) Amethyst: Earned 1,000,000 credits (1,000,576)Cullen/Woodall Sieve (suspended) Ruby: Earned 2,000,000 credits (4,000,977)Generalized Cullen/Woodall Sieve (suspended) Turquoise: Earned 5,000,000 credits (6,843,367)PPS Sieve Emerald: Earned 50,000,000 credits (80,503,891)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Turquoise: Earned 5,000,000 credits (6,473,750)TRP Sieve (suspended) Turquoise: Earned 5,000,000 credits (8,243,608)AP 26/27 Jade: Earned 10,000,000 credits (12,741,619)GFN Double Silver: Earned 200,000,000 credits (492,170,475)WW Double Gold: Earned 500,000,000 credits (728,504,000)PSA Turquoise: Earned 5,000,000 credits (5,042,125)
Message 137119 - Posted: 3 Feb 2020 | 0:33:12 UTC

The date 02/02/2020 was World Palindrome Day. Some parts of the world use Month first, some use Day first, but in over 900 years we have not had a World Palindrome Day. The last one was 11/11/1111.
So as a person who is alive today, you have seen a new Century, Millennium, and a Universal Palindrome date.
____________
My lucky numbers are 121*2^4553899-1 and 3756801695685*2^666669±1
My movie https://vimeo.com/manage/videos/502242

Profile dannyridel
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Joined: 3 Feb 19
Posts: 966
ID: 1097922
Credit: 37,430,217
RAC: 129,188
Discovered 1 mega prime321 LLR Gold: Earned 500,000 credits (705,480)Cullen LLR Silver: Earned 100,000 credits (221,150)ESP LLR Gold: Earned 500,000 credits (517,207)Generalized Cullen/Woodall LLR Amethyst: Earned 1,000,000 credits (1,021,028)PPS LLR Ruby: Earned 2,000,000 credits (3,553,662)PSP LLR Gold: Earned 500,000 credits (616,940)SoB LLR Gold: Earned 500,000 credits (533,625)SR5 LLR Gold: Earned 500,000 credits (512,697)SGS LLR Gold: Earned 500,000 credits (726,147)TRP LLR Silver: Earned 100,000 credits (430,262)Woodall LLR Silver: Earned 100,000 credits (144,022)321 Sieve (suspended) Gold: Earned 500,000 credits (506,814)Generalized Cullen/Woodall Sieve (suspended) Bronze: Earned 10,000 credits (30,033)PPS Sieve Ruby: Earned 2,000,000 credits (3,566,518)AP 26/27 Ruby: Earned 2,000,000 credits (2,316,639)GFN Turquoise: Earned 5,000,000 credits (5,894,957)WW Jade: Earned 10,000,000 credits (15,760,000)PSA Silver: Earned 100,000 credits (373,034)
Message 137123 - Posted: 3 Feb 2020 | 3:08:53 UTC - in response to Message 137119.
Last modified: 3 Feb 2020 | 3:09:39 UTC

So as a person who is alive today, you have seen a new Century, Millennium, and a Universal Palindrome date.


I meet only one of the above requirements...

To add one, I have lived through my first PG anniversary!
____________
My lucky number is 6219*2^3374198+1


Profile denim
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Joined: 22 Sep 08
Posts: 59
ID: 29415
Credit: 699,610,391
RAC: 9,924
321 LLR Gold: Earned 500,000 credits (769,168)Cullen LLR Gold: Earned 500,000 credits (887,426)ESP LLR Amethyst: Earned 1,000,000 credits (1,410,404)Generalized Cullen/Woodall LLR Amethyst: Earned 1,000,000 credits (1,267,322)PPS LLR Gold: Earned 500,000 credits (586,738)PSP LLR Ruby: Earned 2,000,000 credits (2,271,780)SoB LLR Amethyst: Earned 1,000,000 credits (1,061,226)SR5 LLR Gold: Earned 500,000 credits (784,070)SGS LLR Gold: Earned 500,000 credits (596,816)TRP LLR Amethyst: Earned 1,000,000 credits (1,077,438)Woodall LLR Amethyst: Earned 1,000,000 credits (1,036,933)321 Sieve (suspended) Amethyst: Earned 1,000,000 credits (1,048,172)Cullen/Woodall Sieve (suspended) Jade: Earned 10,000,000 credits (16,829,465)Generalized Cullen/Woodall Sieve (suspended) Bronze: Earned 10,000 credits (54,590)PPS Sieve Double Silver: Earned 200,000,000 credits (465,886,457)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Silver: Earned 100,000 credits (115,628)TRP Sieve (suspended) Silver: Earned 100,000 credits (329,325)AP 26/27 Emerald: Earned 50,000,000 credits (68,895,516)GFN Emerald: Earned 50,000,000 credits (75,093,817)WW Emerald: Earned 50,000,000 credits (59,608,000)
Message 138269 - Posted: 24 Feb 2020 | 17:08:25 UTC

Very cool.
____________

Message boards : General discussion : Happy Palindrome Day!

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