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
2129861Factored
FactorDigitsBitsDate
70200218571032.7old
11186939352575552836072269.92022-05-13 23:17:47
ECM
DigitsB1Curves
2550000135 / 280
Estimated T-Level: 22.4 ⓘ
TF below 2^69 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified (Factored)2017-10-08Oliver Kruse63CD982EDEA4A5E61013
Verified (Factored)2017-11-18kkmrkkblmbrbk63CD982EDEA4A5E61116591913
Verified2022-05-13aperson19858FBD5B480870A285297053
History
DateUserTypeResult
2022-05-14Simon JosefssonCERT
PRP Certification
Proof certified good
2022-05-13aperson1C-PRP
M2129861/7020021857/1118693935257555283607 : 9858FBD5B480870A
PRP proof power = 7
PRP: Verified
Proof certified good
2022-05-13debrouxlF-ECM
Factor: 1118693935257555283607 / (ECM curve 1, B1=50000, B2=4900000, Sigma=610418959170444)
2017-11-18kkmrkkblmbrbkC-PRP
M2129861/7020021857 : 63CD982EDEA4A5E6
PRP: Verified (Factored)
PRP without proof (not generated)
2017-10-08Oliver KruseC-PRP
M2129861/7020021857 : 63CD982EDEA4A5E6
PRP: Verified (Factored)
PRP without proof (not generated)
2016-03-18alpertronNF-PM1
B1=500000, B2=15000000, E=12