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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Exponent Range:










MnStatusDetails
2121781Factored
FactorDigitsBitsDate
12730687823.6old
1841242690206494345272167.32022-04-17 18:53:00
ECM
DigitsB1Curves
2550000101 / 280
Estimated T-Level: 21.8
TF below 2^67 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified (Factored)2017-10-07Oliver KruseEF4C8F0336DCE0621013
Verified (Factored)2017-11-17kkmrkkblmbrbkEF4C8F0336DCE0621167475913
Verified2022-04-19_p95holder_E64590E2852D46582174356053
Verified2022-04-23XZTE64590E2852D4658251683153
History
DateUserTypeResult
2022-04-23CavalicoCERT
PRP Certification
Proof certified good
2022-04-23XZTC-PRP
M2121781/12730687/184124269020649434527 : E64590E2852D4658
PRP proof power = 7
PRP: Verified
Proof certified good
2022-04-19_p95holder_C-PRP
M2121781/12730687/184124269020649434527 : E64590E2852D4658
PRP: Verified
PRP without proof (not generated)
2022-04-17_p95holder_F-ECM
Factor: 184124269020649434527 / (ECM curve 4, B1=50000, B2=5000000)
2017-11-17kkmrkkblmbrbkC-PRP
M2121781/12730687 : EF4C8F0336DCE062
PRP: Verified
PRP without proof (not generated)
2017-10-07Oliver KruseC-PRP
M2121781/12730687 : EF4C8F0336DCE062
PRP: Verified
PRP without proof (not generated)
2016-03-16alpertronNF-PM1
B1=500000, B2=15000000, E=12