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
280717Composite, with 2 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
126586523991133.6old
845311873431136.32008-03-05 10:59:29
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
351000000176 / 1566
Estimated T-Level: 30.6
TF below 2^97 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-22Oliver Kruse64253DE88661F63F2013
Verified2017-10-12Oliver Kruse64253DE88661F63F23690413
Verified2017-11-06kkmrkkblmbrbk64253DE88661F63F22144413
Verified2020-04-17Oliver KruseFB639629CD2FF1EB222408053
Verified2024-08-09kkmrkkblmbrbkFB639629CD2FF1EB211700553
History
DateUserTypeResult
2024-11-08yuriy_5-1NF-PM1
B1=25825964, B2=6300646522170
2024-08-09MxguyCERT
PRP Certification
Proof certified good
2024-08-09kkmrkkblmbrbkC-PRP
M280717/12658652399/84531187343 : FB639629CD2FF1EB
PRP proof power = 5
PRP: Verified
Proof certified good
2023-03-19Naegi MakotoNF-PM1
B1=2000000, B2=61940778900
2022-01-03Lisander ViaeneNF-PM1
B1=100000
2020-04-17Oliver KruseC-PRP
M280717/12658652399/84531187343 : FB639629CD2FF1EB
PRP: Verified
PRP without proof (small exponent)
2017-11-06kkmrkkblmbrbkC-PRP
M280717/12658652399/84531187343 : 64253DE88661F63F
PRP: Verified
PRP without proof (small exponent)
2017-10-12Oliver KruseC-PRP
M280717/12658652399/84531187343 : 64253DE88661F63F
PRP: Verified
PRP without proof (small exponent)
2017-09-22Oliver KruseC-PRP
M280717/12658652399/84531187343 : 64253DE88661F63F
PRP: Verified
PRP without proof (not generated)
2017-09-22Oliver KruseC-PRP
M280717/12658652399/84531187343 : 64253DE88661F63F
PRP without proof (not generated)