2 109 421 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
4140204187393670550906679	25	81.8	2016-05-29 11:51:36

ECM

Digits	B1	Curves
25	50000	97 / 280

Estimated T-Level: 21.7 ⓘ

TF below 2^67 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		Ray Pelzer	AC732D9824A26206	0
Verified (Factored)	1999-01-29	Bruce Mitchell	AC732D9824A26206	439950

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-10-07	Oliver Kruse	921CB04EF80FBB81	1	0	1	3
Verified	2017-11-17	kkmrkkblmbrbk	921CB04EF80FBB81	1	1143690	1	3

History

Date	User	Type	Result
2023-01-28	USAFSS	NF-PM1	B1=288000, B2=338550030
2017-11-17	kkmrkkblmbrbk	C-PRP	M2109421/4140204187393670550906679 : 921CB04EF80FBB81 PRP: Verified PRP without proof (not generated)
2017-10-07	Oliver Kruse	C-PRP	M2109421/4140204187393670550906679 : 921CB04EF80FBB81 PRP: Verified PRP without proof (not generated)
2016-05-29	bam	F-ECM	Factor: 4140204187393670550906679 / (ECM curve 3, B1=50000, B2=5000000)
2016-02-23	Mark Rose	NF	no factor from 2^58 to 2^60
2015-12-27	ramgeis	NF	no factor from 2^65 to 2^66
2015-03-15	VictordeHollander	NF	no factor from 2^64 to 2^65
2015-03-15	VictordeHollander	NF	no factor from 2^63 to 2^64
2013-09-05	ramgeis	NF	no factor from 2^62 to 2^63
2012-03-30	Sebastian Hornbostel	NF	no factor from 2^61 to 2^62
2011-01-25	James Heinrich	NF-PM1	B1=140000, B2=3010000, E=6
2011-01-10	Joss	NF-PM1	B1=50000
2010-12-30	Joss	NF-PM1	B1=30000
2009-08-02	USAFSS	NF-PM1	B1=20000, B2=260000
2009-01-03	Sturle Sunde	NF	no factor from 2^60 to 2^61