1 837 903 Exponent Status

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

PrimeNet Exponent Status

M_n

Status

Details

Composite, with 2 known prime factors. Cofactor is composite.

Factored

Factor	Digits	Bits	Date
133999449278641	15	46.9	old
13281786178167483175609	23	73.5	2020-07-21 06:34:30

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	135 / 640

Estimated T-Level: 26.1 ⓘ

TF below 2^82 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified (Factored)	2017-10-04	Oliver Kruse	6E58CB1FBDCB970B	1	0	1	3
Verified (Factored)	2017-11-06	kkmrkkblmbrbk	6E58CB1FBDCB970B	1	1156702	1	3
Verified	2020-07-21	M Miller	1BF505194921B3A2	2	1818945	5	3
Verified	2020-07-27	Yves Bellefeuille	1BF505194921B3A2	2	981208	5	3

History

Date	User	Type	Result
2020-07-27	Yves Bellefeuille	C-PRP	M1837903/133999449278641/13281786178167483175609 : 1BF505194921B3A2 PRP: Verified PRP without proof (not generated)
2020-07-21	M Miller	C-PRP	M1837903/133999449278641/13281786178167483175609 : 1BF505194921B3A2 PRP: Verified PRP without proof (not generated)
2020-07-21	_p95holder_	F-ECM	Factor: 13281786178167483175609 / (ECM curve 1, B1=50000, B2=5000000)
2017-11-06	kkmrkkblmbrbk	C-PRP	M1837903/133999449278641 : 6E58CB1FBDCB970B PRP: Verified PRP without proof (not generated)
2017-10-04	Oliver Kruse	C-PRP	M1837903/133999449278641 : 6E58CB1FBDCB970B PRP: Verified PRP without proof (not generated)
2016-03-16	alpertron	NF-PM1	B1=500000, B2=15000000, E=12