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

PrimeNet Exponent Status

Exponent Range:










MnStatusDetails
42157Factored
FactorDigitsBitsDate
23285768988002411651.0old
22774890478468704939609660548179933107.52021-11-06 17:02:36
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
3510000001566 / 1566
403000000640 / 4588
Estimated T-Level: 35.7
TF below 2^114 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified (Factored)2017-09-21Oliver KruseCFD5529F794E2B911013
Verified (Factored)2017-09-21Oliver KruseCFD5529F794E2B911013
Verified (Factored)2017-11-06kkmrkkblmbrbkCFD5529F794E2B9113723813
Verified (Factored)2020-04-17Oliver Kruse08E426E8442EDC6E12619253
Verified2021-11-06mikr08E426E8442EDC6E2263553
Verified2021-11-06SRJ287708E426E8442EDC6E23301653
History
DateUserTypeResult
2023-04-13JacobZNF-PM1
B1=860000000, B2=697260268054350
2021-11-06SRJ2877C-PRP
M42157/2328576898800241/227748904784687049396096605481799 : 08E426E8442EDC6E
PRP: Verified
PRP without proof (small exponent)
2021-11-06mikrC-PRP
M42157/2328576898800241/227748904784687049396096605481799 : 08E426E8442EDC6E
PRP: Verified
PRP without proof (small exponent)
2021-11-06debrouxlF-ECM
Factor: 227748904784687049396096605481799 / (ECM curve 165, B1=1000000, B2=100000000, Sigma=8794590593247272)
2020-04-17Oliver KruseC-PRP
M42157/2328576898800241 : 08E426E8442EDC6E
PRP: Verified
PRP without proof (small exponent)
2017-11-06kkmrkkblmbrbkC-PRP
M42157/2328576898800241 : CFD5529F794E2B91
PRP: Verified
PRP without proof (small exponent)
2017-09-21Oliver KruseC-PRP
M42157/2328576898800241 : CFD5529F794E2B91
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M42157/2328576898800241 : CFD5529F794E2B91
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M42157/2328576898800241 : CFD5529F794E2B91
PRP without proof (not generated)
2016-09-19kkmrkkblmbrbkNF-PM1
B1=100000000, B2=2000000000, E=12