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
1935827Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
71094508586461683371962.62009-08-08 01:41:04
ECM
DigitsB1Curves
2550000280 / 280
30250000106 / 640
Estimated T-Level: 25.8 ⓘ
TF below 2^81 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)Roger Gariépy230BCC9E3A46AE9F0
Verified (Factored)1999-03-01David Phillips230BCC9E3A46AE9F551034
PRP
StatusDateUserResidueShiftTypeBase
Verified (Factored)2025-09-02Kriesel16B8BEA206F1C958013
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2017-10-05Oliver Kruse9EBE18835F94B3AE1013
Verified2017-11-11kkmrkkblmbrbk9EBE18835F94B3AE173318313
History
DateUserTypeResult
2025-09-03Carlos PinhoCERT
PRP Certification
CERT proof power = 6
Proof certified good
2025-09-02KrieselC-PRP
16B8BEA206F1C958
PRP proof power = 6
PRP: Verified (Factored)
Proof certified good
2025-06-24alex4NF-PM1
B1=7743322, B2=91023182250
2017-11-11kkmrkkblmbrbkC-PRP
M1935827/7109450858646168337 : 9EBE18835F94B3AE
PRP: Verified
PRP without proof (not generated)
2017-10-05Oliver KruseC-PRP
M1935827/7109450858646168337 : 9EBE18835F94B3AE
PRP: Verified
PRP without proof (not generated)
2016-03-16alpertronNF-PM1
B1=500000, B2=15000000, E=12
2009-08-08SubPrimeF-ECM
Factor: 7109450858646168337