Marin Mersenne 2^P-1
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Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

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MnStatusDetails
15007591Factored
FactorDigitsBitsDate
64760916214688632778472272.52016-11-21 00:37:04
ECM
DigitsB1Curves
25500001 / 280
Estimated T-Level: 20.0 ⓘ
TF below 2^61 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)2002-04-14Etienne Gignac Bouchard1687B8D0BA6CB67911742038
Verified (Factored)2006-01-15George Paquin1687B8D0BA6CB67912935377
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2023-06-08Funky Waddle5986C57AC67FC0BD1740829253
History
DateUserTypeResult
2023-06-09daveward2005CERT
PRP Certification
Proof certified good
2023-06-08Funky WaddleC-PRP
M15007591/6476091621468863277847 : 5986C57AC67FC0BD
PRP proof power = 8
PRP: Verified
Proof certified good
2023-04-28JacobZNF-PM1
B1=578000, B2=550533060
2016-11-21bamF-ECM
Factor: 6476091621468863277847 / (ECM curve 1, B1=50000, B2=5000000)
2015-10-19mikrNF
no factor from 2^67 to 2^68
2014-06-11NesowaNF
no factor from 2^66 to 2^67
2014-06-11NesowaNF
no factor from 2^65 to 2^66