2 350 867 Exponent Status

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

PrimeNet Exponent Status

M_n

Details

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

Trial Factored to 2⁶⁸

TF target 2⁶²

Factored

Factor	Digits	Bits	Date
2017836416607121421903	22	70.8	2013-06-01 08:27:45

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	199 / 640

Estimated T-Level: 26.6 ⓘ

TF below 2^83 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift	Software
Factored		Bob Devine	ECC3F778DA7C81FA	0	Windows,Prime95,v13,(aka WP1)
Factored		Michael Cederberg	ECC3F778DA7C81FA	0	Windows,Prime95,v13,(aka WP1)
Factored	1999-03-26	Brian Campbell	ECC3F778DA7C81FA	1821263	Linux 32-bit,Prime95,v17,(aka WT2)

Status	Proof	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	PRP without proof (not generated)	2017-10-12	Oliver Kruse	14C6B95AE8FC2EF6	1	0	1	3
Verified	PRP without proof (not generated)	2017-11-24	storm5510	14C6B95AE8FC2EF6	1	1454731	1	3

History

Date	User	Type	Result
2018-04-27	alpertron	NF-PM1	B1=2000000, B2=60000000, E=12
2017-11-24	storm5510	C-PRP	M2350867/2017836416607121421903 : 14C6B95AE8FC2EF6
2017-10-12	Oliver Kruse	C-PRP	M2350867/2017836416607121421903 : 14C6B95AE8FC2EF6
2013-06-01	hiems	F-ECM	Factor: 2017836416607121421903
2012-06-02	Richard B. Woods	NF	no factor TF: 62-63
2011-08-28	Richard B. Woods	NF	no factor TF: 61-62
2010-03-12	Bud	NF-PM1	B1=250000, B2=25000000, E=12
2009-01-16	Sturle Sunde	NF	no factor TF: 60-61
2003-09-21	-anonymous-	NF-PM1	B1=2048, B2=204800
1999-03-26	Brian Campbell	C-LL	ECC3F778DA7C81FA