Marin Mersenne 2^P-1
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GIMPS
Finding World Record Primes Since 1996

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MnStatusDetails
12817757Factored
FactorDigitsBitsDate
68486354335664103593532272.52019-10-08 03:38:28
ECM
DigitsB1Curves
25500002 / 280
Estimated T-Level: 20.0 ⓘ
TF below 2^62 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)2003-03-27Mason GuyFFD16D2AECD4B32412080703
Verified (Factored)2004-11-22Ars Technica Team Prime RibFFD16D2AECD4B324614902
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2022-05-14Poao42CAA1582221676A1879157753
History
DateUserTypeResult
2023-10-27nordiNF-PM1
B1=500000, B2=446273100
2023-10-20nordiNF-PM1
B1=500000
2022-05-14lajo321CERT
PRP Certification
Proof certified good
2022-05-14PoaoC-PRP
M12817757/6848635433566410359353 : 42CAA1582221676A
PRP proof power = 8
PRP: Verified
Proof certified good
2019-10-08KeysarecoolF-ECM
Factor: 6848635433566410359353 / (ECM curve 1, B1=50000, B2=5000000, Sigma=4825329358199358)
2018-01-07ramgeisNF
no factor from 2^68 to 2^69
2018-01-07ramgeisNF
no factor from 2^67 to 2^68
2015-04-08ThaNF
no factor from 2^66 to 2^67
2014-04-27NesowaNF
no factor from 2^65 to 2^66
2013-06-04lycornNF
no factor from 2^64 to 2^65