Marin Mersenne 2^P-1
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Finding World Record Primes Since 1996

PrimeNet Exponent Status

Exponent Range:










MnStatusDetails
19867Composite, with 2 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
4648879722.1old
202241068889194321107891276732994.02009-06-09 04:08:42
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
3510000001566 / 1566
4030000002477 / 4588
Estimated T-Level: 37.7
TF below 2^120 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-21Oliver Kruse619231396ECC19CB2013
Verified2017-10-12kkmrkkblmbrbk619231396ECC19CB21040013
Verified2020-04-17Oliver KruseE1331AFA38E3279221847353
Verified2024-07-01kkmrkkblmbrbkE1331AFA38E3279221766053
History
DateUserTypeResult
2024-12-31masserNF-PP1
Start=166/31, B1=132000000, B2=131868000000
2024-12-16masserNF-PP1
Start=6/5, B1=132000000, B2=131868000000
2024-12-08masserNF-PP1
Start=2/7, B1=132000000, B2=131868000000
2024-07-01kkmrkkblmbrbkC-PRP
M19867/20224106888919432110789127673/4648879 : E1331AFA38E32792
PRP: Verified
PRP without proof (small exponent)
2023-05-14JacobZNF-PM1
B1=5300000000, B2=15580930497522390
2022-02-06Lisander ViaeneNF-PM1
B1=50000
2020-04-17Oliver KruseC-PRP
M19867/4648879/20224106888919432110789127673 : E1331AFA38E32792
PRP: Verified
PRP without proof (small exponent)
2017-10-12kkmrkkblmbrbkC-PRP
M19867/4648879/20224106888919432110789127673 : 619231396ECC19CB
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M19867/4648879/20224106888919432110789127673 : 619231396ECC19CB
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M19867/4648879/20224106888919432110789127673 : 619231396ECC19CB
PRP without proof (not generated)
2009-06-09unconnectedF-ECM
Factor: 20224106888919432110789127673