4 952 771 Exponent Status

Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

M_n

Status

Details

Composite, with 1 known prime factor. Cofactor is composite.

Factored

Factor	Digits	Bits	Date
566835894190203531524560927889	30	98.8	2009-09-15 16:48:07

ECM

Digits	B1	Curves
25	50000	3 / 280

Estimated T-Level: 20.1 ⓘ

TF below 2^62 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)	1998-08-09	George Potts	3235ECEB0C0DE8C7	0
Verified (Factored)	2000-03-22	Hoang Anh Vo	3235ECEB0C0DE8C7	3615150

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-09-20	kkmrkkblmbrbk	670D37F8FF829E9B	1	0	1	3
Verified	2018-04-16	ATH	670D37F8FF829E9B	1	3811599	1	3

History

Date	User	Type	Result
2023-10-05	USAFSS	NF-PM1	B1=256000, B2=105522060
2018-04-16	ATH	C-PRP	M4952771/566835894190203531524560927889 : 670D37F8FF829E9B PRP: Verified PRP without proof (not generated)
2017-09-20	kkmrkkblmbrbk	C-PRP	M4952771/566835894190203531524560927889 : 670D37F8FF829E9B PRP: Verified PRP without proof (not generated)
2009-09-15	Carsten Kossendey	F-PM1	Factor: 566835894190203531524560927889