2 267 719 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
10791995856596349915617	23	73.2	2017-12-25 02:06:19

ECM

Digits	B1	Curves
25	50000	181 / 280

Estimated T-Level: 23.2 ⓘ

TF below 2^72 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		Stephen Gervais	9FA4FC0040E5FDBF	0
Verified (Factored)	1999-06-06	Kent Lee	9FA4FC0040E5FDBF	1152418

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-12-26	Chun sung soo	BED8605EECF72E89	1	1341428	5	3
Verified	2017-12-27	Oliver Kruse	BED8605EECF72E89	1	299401	5	3

History

Date	User	Type	Result
2017-12-27	Oliver Kruse	C-PRP	M2267719/10791995856596349915617 : BED8605EECF72E89 PRP: Verified PRP without proof (not generated)
2017-12-26	Chun sung soo	C-PRP	M2267719/10791995856596349915617 : BED8605EECF72E89 PRP: Verified PRP without proof (not generated)
2017-12-25	bam	F-ECM	Factor: 10791995856596349915617 / (ECM curve 1, B1=50000, B2=5000000)
2017-01-15	Gordon Spence	NF	no factor from 2^66 to 2^67
2016-04-11	Joss	NF-PM1	B1=447897, B2=16249228, E=12
2016-04-03	Joss	NF-PM1	B1=373248, B2=6718464, E=12
2016-04-02	Joss	NF-PM1	B1=311040
2016-02-23	Mark Rose	NF	no factor from 2^1 to 2^60
2015-10-31	ramgeis	NF	no factor from 2^65 to 2^66
2015-03-10	VictordeHollander	NF	no factor from 2^64 to 2^65
2015-03-10	VictordeHollander	NF	no factor from 2^63 to 2^64
2014-09-02	Joss	NF-PM1	B1=128303
2013-12-06	Jerry Hallett	NF	no factor from 2^62 to 2^63
2012-05-06	Sebastian Hornbostel	NF	no factor from 2^61 to 2^62
2011-01-03	markr	NF-PM1	B1=100000, B2=2100000, E=6
2010-11-12	Joss	NF-PM1	B1=30000
2010-11-06	Joss	NF-PM1	B1=15000
2009-01-11	Sturle Sunde	NF	no factor from 2^60 to 2^61