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
7883Composite, with 2 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
15767513.9old
441449618.8old
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
3510000001566 / 1566
4030000004588 / 4588
45110000006059 / 9201
Estimated T-Level: 43.3
TF below 2^139 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-21Oliver Kruse75B9C032F9D95ABC2013
Verified2017-10-12kkmrkkblmbrbk75B9C032F9D95ABC2478913
Verified2020-04-17Oliver Kruse8323C5E5DA8E67FA2310853
Verified (Factored)2022-05-12Jorge Coveiro8323C5E5DA8E67FA1547253
Verified2024-02-03Wentao Huang8323C5E5DA8E67FA2772953
History
DateUserTypeResult
2024-04-09masserNF-PM1
B1=50000000000, B2=8775299674841700
2024-02-03Wentao HuangC-PRP
M7883/15767/441449 : 8323C5E5DA8E67FA
PRP: Verified
PRP without proof (small exponent)
2022-05-12Jorge CoveiroC-PRP
M7883/15767 : 8323C5E5DA8E67FA
PRP: Verified
PRP without proof (small exponent)
2021-12-16Lisander ViaeneNF-PM1
B1=100000000
2020-04-17Oliver KruseC-PRP
M7883/15767/441449 : 8323C5E5DA8E67FA
PRP: Verified
PRP without proof (small exponent)
2017-10-12kkmrkkblmbrbkC-PRP
M7883/15767/441449 : 75B9C032F9D95ABC
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M7883/15767/441449 : 75B9C032F9D95ABC
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M7883/15767/441449 : 75B9C032F9D95ABC
PRP without proof (not generated)