1 470 199 Exponent Status

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

PrimeNet Exponent Status

M_n

Status

Details

Factored

Factor	Digits	Bits	Date
49986767	8	25.6	old
10855949417	11	33.3	2008-07-15 10:00:02

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	105 / 640

Estimated T-Level: 25.8 ⓘ

TF below 2^81 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-10-01	Oliver Kruse	E247204505326B5C	2	0	1	3
Verified	2017-10-28	kkmrkkblmbrbk	E247204505326B5C	2	1411851	1	3

P-1 factors

Date	Factor	B1	B2
2023-10-20	542653814071364839	5000000	5000000

History

Date	User	Type	Result
2023-10-20	Anton Tsvetkov	F-PM1	Factors: 49986767,10855949417 / (P-1, B1=5000000)
2017-10-28	kkmrkkblmbrbk	C-PRP	M1470199/49986767/10855949417 : E247204505326B5C PRP: Verified PRP without proof (not generated)
2017-10-01	Oliver Kruse	C-PRP	M1470199/49986767/10855949417 : E247204505326B5C PRP: Verified PRP without proof (not generated)
2016-03-17	alpertron	NF-PM1	B1=500000, B2=15000000, E=12
2008-07-15	J Feitsma	F	Factor: 10855949417