2 598 919 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
193797714710036213965549271	27	87.3	2016-09-02 22:27:52

ECM

Digits	B1	Curves
25	50000	21 / 280

Estimated T-Level: 20.4 ⓘ

TF below 2^63 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		John Guin	A8DB16F4D90B6B2A	0
Verified (Factored)	1999-08-31	Wayne Beardsley	A8DB16F4D90B6B2A	676419

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-10-15	Oliver Kruse	E311862EA073714B	1	95427	5	3
Verified	2017-12-02	kkmrkkblmbrbk	E311862EA073714B	1	110983	5	3

P-1 factors

Date	Factor	B1	B2
2016-09-02	193797714710036213965549271	3200000	112000000

History

Date	User	Type	Result
2017-12-02	kkmrkkblmbrbk	C-PRP	M2598919/193797714710036213965549271 : E311862EA073714B PRP: Verified PRP without proof (not generated)
2017-10-15	Oliver Kruse	C-PRP	M2598919/193797714710036213965549271 : E311862EA073714B PRP: Verified PRP without proof (not generated)
2016-09-02	mikr	F-PM1	Factor: 193797714710036213965549271 / (P-1, B1=3200000, B2=112000000, E=12)
2016-02-23	Mark Rose	NF	no factor from 2^59 to 2^60
2015-11-05	ramgeis	NF	no factor from 2^65 to 2^66
2015-02-27	VictordeHollander	NF	no factor from 2^64 to 2^65
2015-02-27	VictordeHollander	NF	no factor from 2^63 to 2^64
2013-01-14	dbaugh	NF	no factor from 2^62 to 2^63
2012-06-23	Sebastian Hornbostel	NF	no factor from 2^61 to 2^62
2011-04-19	James Heinrich	NF-PM1	B1=175000, B2=4156250, E=6
2011-01-15	Joss	NF-PM1	B1=50000
2010-11-16	Joss	NF-PM1	B1=20000
2009-01-30	Sturle Sunde	NF	no factor from 2^60 to 2^61