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Congrats to all the members of PrimeGrid who have helped to check and double check 3*2^n+1 and 3*2^n-1 for all candidates below 3 million decimal digits,
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 Nick 
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Nice work. I can't help but think that you may have been inspired by Red Dwarf psi-moon episode. But anyways - good ideas are universal. RIP 3*2^n+1 and 3*2^n-1 candidates below 3 million decimal digits! |
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It's a milestone not a tombstone! LOL. Viva 321.
Please elucidate about the Red Dwarf episode. I can find only parts of it on YouTube. |
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Nick
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This is excellently going off topic from primes. Rimmer is on a moon that terra-forms (and psycho-forms?) from his personality.
You wanted the episode - I just looked at my TVR - all I can get is MCMXCII which is 1992?
I looked at the start again - the episode is called Terrorform. |
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Congrats to PrimeGrid's crunchers for double checking all 3*2^n-1 and 3*2^n+1 up to exponent 11 million. The former should get a new prime with an exponent less than 12 million! |
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Big congrats to PrimeGrid members for getting 3*2^n+-1 up to 12M bits. |
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Another milestone: Congratulations to PrimeGrid members for double checking 3*2^n+-1 for all n below 12.5 million. |
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Congrats to PG users for double checking both 3*2^n+-1 up to 13M+ bits |
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All 321 candidates below 13.5M bits have now been double checked by PG. Congrats to you all for you endeavours. |
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PrimeGrid has now double checked + and - for 321 for n less than 14M bits. Congrats and good luck finding the next 321 prime. |
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PrimeGrid has surpassed 14.5 million bits -- double checked for + and -.
Hoping for a new prime soon! |
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Michael GoetzVolunteer moderator
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PrimeGrid has surpassed 14.5 million bits -- double checked for + and -.
Hoping for a new prime soon!
It's been a while.
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My lucky number is 75898524288+1 |
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Ravi FernandoProject administrator
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We've now tested and double-checked all candidates through 15 million bits--the last candidate finished DCing less than a day before the SoB double-check ended. On to 16M! |
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Ravi FernandoProject administrator
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Double-checked through 15.5 million bits. This last half-million went much faster than usual thanks to the ARPANET challenge in October. |
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darkclownVolunteer tester
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fwiw, Season 5, Episode 3 is Red Dwarf "Terraform"
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My lucky #: 60133106^131072+1 (GFN 17-mega) |
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Nick
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fwiw, Season 5, Episode 3 is Red Dwarf "Terraform"
I was quite surprised to find that posting in 2013 referring to red dwarf.
After a few moments of what the? I do remember it.
However, it makes zero sense :) |
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It's been a while.
There were some fantastic 18 months from January 2014 through June 2015 where four 321 finds were done. Since then, no more finds.
When will the next one occur? Links:
/JeppeSN
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Ravi FernandoProject administrator
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Done through 16M bits!
Still no new primes since 3*2^11895718-1. At this point one would expect about 2.5 new primes since then, with over a 90% chance of at least one. As for the future, there should be about 1 prime between n=16M and 18M. |
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Ravi FernandoProject administrator
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We've now finished testing all candidates through 16.5M bits, and the leading edge is just over 5M digits. Two exciting things have happened since the last update: first, we started using Pavel Atnashev's LLR2, which effectively doubles the speed of the search. And second, the drought finally ended with Scott Brown's 4,939,547-digit prime 3*2^16408818+1! |
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