5 379 607 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
407383427708813267711	21	68.5	2019-07-19 15:24:55

ECM

Digits	B1	Curves
25	50000	9 / 280

Estimated T-Level: 20.2 ⓘ

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

Status	Date	User	Residue	Shift
Verified (Factored)	1998-07-21	Bob O'Brien	C51E0E3C67D4AD4B	0
Verified (Factored)	2000-08-10	David Allen	C51E0E3C67D4AD4B	1373422

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2019-07-20	Niels_Mache_Nextcloud	2E843592FAB6EB79	1	34153	5	3
Verified	2019-07-21	kkmrkkblmbrbk	2E843592FAB6EB79	1	956016	5	3

P-1 factors

Date	Factor	B1	B2
2019-07-19	407383427708813267711	320000	9520000

History

Date	User	Type	Result
2019-07-21	kkmrkkblmbrbk	C-PRP	M5379607/407383427708813267711 : 2E843592FAB6EB79 PRP: Verified PRP without proof (not generated)
2019-07-20	Niels_Mache_Nextcloud	C-PRP	M5379607/407383427708813267711 : 2E843592FAB6EB79 PRP: Verified PRP without proof (not generated)
2019-07-19	USAFSS	F-PM1	Factor: 407383427708813267711 / (P-1, B1=320000, B2=9520000, E=12)
2018-06-19	ramgeis	NF	no factor from 2^67 to 2^68
2016-08-12	Gordon Spence	NF	no factor from 2^66 to 2^67
2015-08-19	snme2pm1	NF	no factor from 2^65 to 2^66
2014-12-24	VictordeHollander	NF	no factor from 2^64 to 2^65
2014-12-24	VictordeHollander	NF	no factor from 2^63 to 2^64
2009-11-20	USAFSS	NF-PM1	B1=60000, B2=1020000, E=6
2009-05-19	GrunwalderGIMP	NF	no factor from 2^62 to 2^63