6 250 157 Exponent Status

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

PrimeNet Exponent Status

M_n

Status

Details

Composite, with 4 known prime factors. Cofactor is composite.

Factored

Factor	Digits	Bits	Date
4621166080777	13	42.1	old
42104188380644441	17	55.2	2015-01-13 12:20:10
137501398448365841	18	56.9	2015-05-12 11:19:30
38866239729217457057	20	65.1	2018-05-22 11:23:34

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified (Factored)	2017-10-13	kkmrkkblmbrbk	372D85FD21559197	3	4172425	5	3
Verified	2018-06-01	_p95holder_	372D85FD21559197	4	3835548	5	3

History

Date	User	Type	Result
2023-11-15	Stef42	NF-PM1	B1=109000, B2=190507590
2022-03-19	LordJulius	NF	no factor from 2^64 to 2^65
2022-03-19	LordJulius	NF	no factor from 2^63 to 2^64
2018-06-01	_p95holder_	C-PRP	M6250157/4621166080777/42104188380644441/137501398448365841/38866239729217457057 : 372D85FD21559197 PRP: Verified PRP without proof (not generated)
2018-05-22	TJAOI	F	Factor: 38866239729217457057 / TF: 65-66
2017-10-13	kkmrkkblmbrbk	C-PRP	M6250157/4621166080777/42104188380644441/137501398448365841 : 372D85FD21559197 PRP: Verified PRP without proof (not generated)
2015-05-12	TJAOI	F	Factor: 137501398448365841 / TF: 56-57
2015-01-13	TJAOI	F	Factor: 42104188380644441 / TF: 55-56