8 148 401 Exponent Status

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

PrimeNet Exponent Status

M_n

Status

Details

Factored

Factor	Digits	Bits	Date
72280836556787039742887	23	75.9	2012-10-30 18:42:08

Status	Date	User	Residue	Shift
Verified (Factored)	1999-09-14	Bill Heckel	68DB186AA2CA1706	1886971
Verified (Factored)	2002-09-22	Ars Technica Team Prime Rib	68DB186AA2CA1706	5331690

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2018-08-30	M Graber	0679B36C5340E73D	1	1066539	5	3
Verified	2020-02-20	tottenhoff	0679B36C5340E73D	1	1926737	5	3

P-1 factors

Date	Factor	B1	B2
2012-10-30	72280836556787039742887	100000	1975000

History

Date	User	Type	Result
2023-08-02	Flaukrotist	NF	no factor from 2^68 to 2^69
2023-06-21	Flaukrotist	NF-PM1	B1=2200000, B2=1965643020
2022-06-22	LordJulius	NF	no factor from 2^66 to 2^67
2022-06-22	LordJulius	NF	no factor from 2^65 to 2^66
2022-06-22	LordJulius	NF	no factor from 2^64 to 2^65
2022-06-22	LordJulius	NF	no factor from 2^63 to 2^64
2022-05-31	Flaukrotist	NF	no factor from 2^67 to 2^68
2020-02-20	tottenhoff	C-PRP	M8148401/72280836556787039742887 : 0679B36C5340E73D PRP: Verified PRP without proof (not generated)
2018-08-30	M Graber	C-PRP	M8148401/72280836556787039742887 : 0679B36C5340E73D PRP: Verified PRP without proof (not generated)
2012-10-30	Nesowa	F-PM1	Factor: 72280836556787039742887