2 947 999 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
185961933971661264563017	24	77.3	2016-01-01 09:14:04

ECM

Digits	B1	Curves
25	50000	11 / 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)		David Miller	3334DA7A5A602F39	0
Bad		Luke Welsh	FCAA8CDD92E77712	0
Verified (Factored)	1999-08-22	Hgin normaalilyseo	3334DA7A5A602F39	1014585

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-09-30	alpertron	32105DCC840415D9	1	0	1	3
Verified	2017-11-18	Oliver Kruse	32105DCC840415D9	1	2113737	1	3

History

Date	User	Type	Result
2017-11-18	Oliver Kruse	C-PRP	M2947999/185961933971661264563017 : 32105DCC840415D9 PRP: Verified PRP without proof (not generated)
2017-09-30	alpertron	C-PRP	M2947999/185961933971661264563017 : 32105DCC840415D9 PRP: Verified PRP without proof (not generated)
2016-02-23	Mark Rose	NF	no factor from 2^1 to 2^60
2016-01-01	bam	F-ECM	Factor: 185961933971661264563017 / (ECM curve 2, B1=50000, B2=5000000)
2015-04-30	VictordeHollander	NF-PM1	B1=1000000, B2=20000000, E=12
2015-04-27	VictordeHollander	NF	no factor from 2^64 to 2^65
2015-04-27	VictordeHollander	NF	no factor from 2^63 to 2^64
2014-11-06	Joss	NF-PM1	B1=116772
2013-01-07	dbaugh	NF	no factor from 2^62 to 2^63
2011-07-16	Rob_Dee	NF	no factor from 2^61 to 2^62
2010-11-04	markr	NF-PM1	B1=95000, B2=1971250, E=6
2009-02-13	Sturle Sunde	NF	no factor from 2^60 to 2^61