4 371 701 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
1403229863761778301463	22	70.2	2013-03-26 03:46:59

ECM

Digits	B1	Curves
25	50000	5 / 280

Estimated T-Level: 20.1 ⓘ

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

Status	Date	User	Residue	Shift
Verified (Factored)	1998-03-31	James Bayless	A25E743756BE526E	0
Verified (Factored)	1999-11-24	Aaron B	A25E743756BE526E	1447625

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-09-20	kkmrkkblmbrbk	092F6B4956636B5E	1	0	1	3
Verified	2018-02-04	trebor	092F6B4956636B5E	1	3245734	1	3

History

Date	User	Type	Result
2023-05-04	USAFSS	NF-PM1	B1=448000, B2=251346810
2018-02-04	trebor	C-PRP	M4371701/1403229863761778301463 : 092F6B4956636B5E PRP: Verified PRP without proof (not generated)
2017-09-20	kkmrkkblmbrbk	C-PRP	M4371701/1403229863761778301463 : 092F6B4956636B5E PRP: Verified PRP without proof (not generated)
2013-03-26	S00030	F-ECM	Factor: 1403229863761778301463
2012-02-10	GrunwalderGIMP	NF	no factor from 2^1 to 2^63
2012-01-04	Squeeky_Squirrel	NF-PM1	B1=110000, B2=2255000, E=6
2010-11-16	markr	NF	no factor from 2^61 to 2^62
2009-09-06	Carsten Kossendey	NF-PM1	B1=25000, B2=356250