201 815 839 Exponent Status

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

PrimeNet Exponent Status

M_n

Status

Details

Composite: 1 known prime factor

Factored

Factor	Digits	Bits	Date
628987426654726738818108847	27	89.0	2024-11-26 11:04:03

P-1 factors

Date	Factor	B1	B2
2024-11-26	628987426654726738818108847	1800000	475022058

History

Date	User	Type	Result
2024-11-26	zr_zircon	F-PM1	Factor: 628987426654726738818108847 / (P-1, B1=1800000, B2=475022058)
2024-10-27	zr_zircon	NF	no factor from 2^78 to 2^79
2024-10-27	zr_zircon	NF	no factor from 2^77 to 2^78
2024-09-16	zr_zircon	NF	no factor from 2^76 to 2^77
2024-09-09	zr_zircon	NF	no factor from 2^75 to 2^76
2023-04-29	SRBase	NF	no factor from 2^74 to 2^75
2020-03-16	hkt	NF	no factor from 2^73 to 2^74
2020-03-16	hkt	NF	no factor from 2^72 to 2^73
2020-03-16	hkt	NF	no factor from 2^71 to 2^72
2019-09-23	sasaki	NF	no factor from 2^70 to 2^71
2016-06-09	La Güira	NF	no factor from 2^69 to 2^70
2016-06-09	La Güira	NF	no factor from 2^67 to 2^69
2015-09-25	aurashift	NF	no factor from 2^66 to 2^67
2013-07-17	subgenius	NF	no factor from 2^65 to 2^66
2011-05-03	Richard	NF	no factor from 2^64 to 2^65