Marin Mersenne 2^P-1
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Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

Exponent Range:










MnStatusDetails
2209721Factored
FactorDigitsBitsDate
17677769824.1old
243069311927.92008-07-14 20:21:57
ECM
DigitsB1Curves
255000088 / 280
Estimated T-Level: 21.6 ⓘ
TF below 2^67 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2017-10-09Oliver Kruse572AD941D024588A2013
Verified2017-11-20kkmrkkblmbrbk572AD941D024588A2138025613
History
DateUserTypeResult
2021-07-03Dylan DelgadoNF-PM1
B1=2000000, B2=242000000
2021-06-29Dylan DelgadoNF-PM1
B1=1000000, B2=106000000
2017-11-20kkmrkkblmbrbkC-PRP
M2209721/17677769/243069311 : 572AD941D024588A
PRP: Verified
PRP without proof (not generated)
2017-10-09Oliver KruseC-PRP
M2209721/17677769/243069311 : 572AD941D024588A
PRP: Verified
PRP without proof (not generated)
2016-04-18alpertronNF-PM1
B1=500000, B2=15000000, E=12
2008-07-14George WoltmanF-ECM
Factor: 243069311