1 321 171 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
8399774438446404972583	22	72.8	2014-03-09 18:09:29

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	105 / 640

Estimated T-Level: 25.8 ⓘ

TF below 2^81 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		Joel Armengaud	7DC38B2880BC9FF4	0
Verified (Factored)		Simon Burge	7DC38B2880BC9FF4	0
Verified (Factored)		Brian J. Beesley	7DC38B2880BC9FF4	386057

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-09-30	Oliver Kruse	A72CFBCCAA7E1D9F	1	0	1	3
Verified	2017-10-23	kkmrkkblmbrbk	A72CFBCCAA7E1D9F	1	950022	1	3

History

Date	User	Type	Result
2022-03-07	LordJulius	NF	no factor from 2^58 to 2^60
2017-10-23	kkmrkkblmbrbk	C-PRP	M1321171/8399774438446404972583 : A72CFBCCAA7E1D9F PRP: Verified PRP without proof (not generated)
2017-09-30	Oliver Kruse	C-PRP	M1321171/8399774438446404972583 : A72CFBCCAA7E1D9F PRP: Verified PRP without proof (not generated)
2016-03-17	alpertron	NF-PM1	B1=500000, B2=15000000, E=12
2014-03-09	bam	F-ECM	Factor: 8399774438446404972583
2013-01-10	dbaugh	NF	no factor from 2^62 to 2^63
2012-11-03	kurly	NF-PM1	B1=500000, B2=10000000, E=12
2012-09-14	Axelsson	NF	no factor from 2^61 to 2^62
2009-02-14	Sturle Sunde	NF	no factor from 2^60 to 2^61