2 978 869 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
13705717081811779169689	23	73.5	2015-05-08 13:54:19

ECM

Digits	B1	Curves
25	50000	96 / 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)	1997-11-11	Torbjörn Alm	39BFCF120472A2A1	0
Verified (Factored)	1999-12-15	Ruediger K. Eckhard	39BFCF120472A2A1	1545312

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-10-26	alpertron	3D002E12835BF6B3	1	164822	5	3
Verified	2017-11-18	Oliver Kruse	3D002E12835BF6B3	1	2285328	5	3

P-1 factors

Date	Factor	B1	B2
2015-05-08	13705717081811779169689	1000000	20000000

History

Date	User	Type	Result
2017-11-18	Oliver Kruse	C-PRP	M2978869/13705717081811779169689 : 3D002E12835BF6B3 PRP: Verified PRP without proof (not generated)
2017-10-26	alpertron	C-PRP	M2978869/13705717081811779169689 : 3D002E12835BF6B3 PRP: Verified PRP without proof (not generated)
2015-05-08	VictordeHollander	F-PM1	Factor: 13705717081811779169689 / (P-1, B1=1000000, B2=20000000, E=12)
2015-04-29	VictordeHollander	NF	no factor from 2^64 to 2^65
2015-04-29	VictordeHollander	NF	no factor from 2^63 to 2^64
2013-01-07	dbaugh	NF	no factor from 2^62 to 2^63
2011-11-30	markr	NF	no factor from 2^61 to 2^62
2010-10-26	markr	NF-PM1	B1=95000, B2=1995000, E=6
2009-02-14	Sturle Sunde	NF	no factor from 2^60 to 2^61