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
1063123Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
25110965271031.2old
ECM
DigitsB1Curves
2550000280 / 280
30250000100 / 640
Estimated T-Level: 25.8
TF below 2^81 is very unlikely to find new factors due to ECM effort.
PRP
StatusDateUserResidueShiftTypeBase
Verified (Factored)2025-09-01Kriesel702E0CE7760C4D8E013
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-28Oliver Kruse38C30FD5007576BC1013
Verified2017-10-19kkmrkkblmbrbk38C30FD5007576BC182486213
History
DateUserTypeResult
2025-09-03Dennis OkonCERT
PRP Certification
CERT proof power = 6
Proof certified good
2025-09-01KrieselC-PRP
702E0CE7760C4D8E
PRP proof power = 6
PRP: Verified (Factored)
Proof certified good
2024-06-08USAFSSNF-PM1
B1=780000, B2=2591239560
2017-10-19kkmrkkblmbrbkC-PRP
M1063123/2511096527 : 38C30FD5007576BC
PRP: Verified
PRP without proof (not generated)
2017-09-28Oliver KruseC-PRP
M1063123/2511096527 : 38C30FD5007576BC
PRP: Verified
PRP without proof (not generated)