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
16427Composite, with 2 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
427103618.7old
13365474831408280283152572580.12008-08-29 02:24:38
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
3510000001566 / 1566
4030000004588 / 4588
45110000001273 / 9201
Estimated T-Level: 40.7
TF below 2^130 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-21Oliver Kruse3F21FC13345D07FD2013
Verified2017-10-12kkmrkkblmbrbk3F21FC13345D07FD2777413
Verified2020-04-17Oliver Kruse4D993A37A2EECF78295653
Verified2024-07-01kkmrkkblmbrbk4D993A37A2EECF782304153
History
DateUserTypeResult
2025-01-01masserNF-PP1
Start=6/5, B1=180000000, B2=179820000000
2024-12-22masserNF-PP1
Start=2/7, B1=180000000, B2=179820000000
2024-12-20masserNF-PP1
Start=125/47, B1=180000000, B2=179820000000
2024-10-15-Anonymous-NF-PM1
B1=100000000000, B2=120420153999155010
2024-07-01kkmrkkblmbrbkC-PRP
M16427/1336547483140828028315257/427103 : 4D993A37A2EECF78
PRP: Verified
PRP without proof (small exponent)
2023-05-26JacobZNF-PM1
B1=6500000000, B2=27519071588408400
2023-02-12USAFSSNF-PM1
B1=60000000, B2=4543108760190
2022-02-06Lisander ViaeneNF-PM1
B1=50000
2020-04-17Oliver KruseC-PRP
M16427/427103/1336547483140828028315257 : 4D993A37A2EECF78
PRP: Verified
PRP without proof (small exponent)
2017-10-12kkmrkkblmbrbkC-PRP
M16427/427103/1336547483140828028315257 : 3F21FC13345D07FD
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M16427/427103/1336547483140828028315257 : 3F21FC13345D07FD
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M16427/427103/1336547483140828028315257 : 3F21FC13345D07FD
PRP without proof (not generated)
2008-08-29-Anonymous-F-ECM
Factor: 1336547483140828028315257