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
6205777Factored
FactorDigitsBitsDate
1494237678398678769192167.02018-06-01 13:51:47
ECM
DigitsB1Curves
25500006 / 280
Estimated T-Level: 20.1
TF below 2^62 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)1998-11-07Chuck Kamas4DD3B8141B48F93D0
Verified (Factored)2001-10-13Dennis Burke4DD3B8141B48F93D4473681
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2018-06-18_p95holder_BD5D30FD28405F4C17226453
Verified2018-06-19kkmrkkblmbrbkBD5D30FD28405F4C164213953
History
DateUserTypeResult
2018-06-19kkmrkkblmbrbkC-PRP
M6205777/149423767839867876919 : BD5D30FD28405F4C
PRP: Verified
PRP without proof (not generated)
2018-06-18_p95holder_C-PRP
M6205777/149423767839867876919 : BD5D30FD28405F4C
PRP: Verified
PRP without proof (not generated)
2018-06-01ramgeisF
Factor: 149423767839867876919 / TF: 67-68*
2016-03-18Gordon SpenceNF
no factor from 2^66 to 2^67
2016-02-23Mark RoseNF
no factor from 2^62 to 2^63
2015-10-10snme2pm1NF
no factor from 2^65 to 2^66
2014-09-17monstNF
no factor from 2^64 to 2^65
2014-09-12NesowaNF
no factor from 2^63 to 2^64
2011-05-09markrNF-PM1
B1=160000, B2=3440000, E=6