4 664 977 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
2132394802636735414153	22	70.9	2018-07-04 14:06:56

ECM

Digits	B1	Curves
25	50000	9 / 280

Estimated T-Level: 20.2 ⓘ

TF below 2^62 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)	1998-05-16	Michael Kurtz	861BBAF7A1E0B569	0
Verified (Factored)	2000-01-19	Thomas Honold	861BBAF7A1E0B569	846174

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2018-07-04	ATH	48BC2D18F7DCF284	1	3118450	5	3
Verified	2018-07-05	axn	48BC2D18F7DCF284	1	4453907	5	3

P-1 factors

Date	Factor	B1	B2
2018-07-04	2132394802636735414153	1988203	61634303

History

Date	User	Type	Result
2018-07-05	axn	C-PRP	M4664977/2132394802636735414153 : 48BC2D18F7DCF284 PRP: Verified PRP without proof (not generated)
2018-07-04	ATH	C-PRP	M4664977/2132394802636735414153 : 48BC2D18F7DCF284 PRP: Verified PRP without proof (not generated)
2018-07-04	Ismo Laitela	F-PM1	Factor: 2132394802636735414153 / (P-1, B1=1988203, B2=61634303, E=12)
2016-02-23	Mark Rose	NF	no factor from 2^62 to 2^63
2015-07-08	snme2pm1	NF	no factor from 2^65 to 2^66
2015-02-10	monst	NF	no factor from 2^64 to 2^65
2015-02-09	Jayder	NF	no factor from 2^63 to 2^64
2012-02-17	Squeeky_Squirrel	NF-PM1	B1=110000, B2=2090000, E=6
2011-12-11	GrunwalderGIMP	NF	no factor from 2^1 to 2^63
2010-07-13	markr	NF	no factor from 2^61 to 2^62
2009-08-21	Carsten Kossendey	NF-PM1	B1=25000, B2=381250