2 230 457 Exponent Status

Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

M_n

Status

Details

Composite, with 1 known prime factor. Cofactor is composite.

Factored

Factor	Digits	Bits	Date
2531596688108118902273	22	71.1	2015-11-25 15:43:19

ECM

Digits	B1	Curves
25	50000	122 / 280

Estimated T-Level: 22.2 ⓘ

TF below 2^69 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		nphan	E8794AE271F0EF3A	0
Verified (Factored)		Jeff Woods	E8794AE271F0EF3A	0
Verified (Factored)	1999-11-24	David Campeau	E8794AE271F0EF3A	1568268

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-09-30	alpertron	844C60F0FD27D6AB	1	0	1	3
Verified	2017-10-28	Oliver Kruse	844C60F0FD27D6AB	1	1658113	1	3

P-1 factors

Date	Factor	B1	B2
2015-11-25	2531596688108118902273	1000000	10000000

History

Date	User	Type	Result
2017-10-28	Oliver Kruse	C-PRP	M2230457/2531596688108118902273 : 844C60F0FD27D6AB PRP: Verified PRP without proof (not generated)
2017-09-30	alpertron	C-PRP	M2230457/2531596688108118902273 : 844C60F0FD27D6AB PRP: Verified PRP without proof (not generated)
2016-04-11	alpertron	NF-PM1	B1=500000, B2=15000000, E=12
2015-11-25	Alexander Dubrovin	F-PM1	Factor: 2531596688108118902273 / (P-1, B1=1000000, B2=10000000, E=12)
2015-10-25	ramgeis	NF	no factor from 2^65 to 2^66
2015-05-06	Squeeky_Squirrel	NF-PM1	B1=160000, B2=4600000, E=6
2015-03-06	VictordeHollander	NF	no factor from 2^64 to 2^65
2015-03-06	VictordeHollander	NF	no factor from 2^63 to 2^64
2014-09-30	Joss	NF-PM1	B1=142552
2014-05-26	Joss	NF-PM1	B1=113776
2013-01-23	dbaugh	NF	no factor from 2^62 to 2^63
2012-04-20	Sebastian Hornbostel	NF	no factor from 2^61 to 2^62
2011-01-13	Oscar Östlin	NF-PM1	B1=85000, B2=1615000, E=6
2010-10-26	Oscar Östlin	NF-PM1	B1=75011
2009-01-11	Sturle Sunde	NF	no factor from 2^60 to 2^61