Marin Mersenne 2^P-1
Username
Password
Forgot password?
Black
Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

Exponent Range:










MnStatusDetails
2798083Composite, with 2 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
201461977927.6old
197218685053598550271192374.12023-01-21 22:05:34
ECM
DigitsB1Curves
255000056 / 280
Estimated T-Level: 21.0 ⓘ
TF below 2^65 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified (Factored)2017-10-21Oliver KruseFC7B3F69D8BFEDA41208037553
Verified (Factored)2017-12-06kkmrkkblmbrbkFC7B3F69D8BFEDA4138159153
Verified2023-01-22LordJuliusFC7B3F69D8BFEDA4287802553
P-1 factors
DateFactorB1B2
2023-01-2119721868505359855027119245000252549990
History
DateUserTypeResult
2023-01-22MatiasCardulloCERT
PRP Certification
Proof certified good
2023-01-22LordJuliusC-PRP
M2798083/201461977/19721868505359855027119 : FC7B3F69D8BFEDA4
PRP proof power = 7
PRP: Verified
Proof certified good
2023-01-21USAFSSF-PM1
Factor: 19721868505359855027119 / (P-1, B1=245000, B2=252549990)
2017-12-06kkmrkkblmbrbkC-PRP
M2798083/201461977 : FC7B3F69D8BFEDA4
PRP: Verified (Factored)
PRP without proof (not generated)
2017-10-21Oliver KruseC-PRP
M2798083/201461977 : FC7B3F69D8BFEDA4
PRP: Verified (Factored)
PRP without proof (not generated)