1 357 429 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
521252737	9	29.0	old
28853206693808968464857	23	74.6	2015-01-28 18:47:19

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	2017-09-30	Oliver Kruse	99AEC179018A2B8D	2	0	1	3
Verified	2017-10-24	kkmrkkblmbrbk	99AEC179018A2B8D	2	86321	1	3

P-1 factors

Date	Factor	B1	B2
2015-01-28	28853206693808968464857	500000	15000000

History

Date	User	Type	Result
2017-10-24	kkmrkkblmbrbk	C-PRP	M1357429/521252737/28853206693808968464857 : 99AEC179018A2B8D PRP: Verified PRP without proof (not generated)
2017-09-30	Oliver Kruse	C-PRP	M1357429/521252737/28853206693808968464857 : 99AEC179018A2B8D PRP: Verified PRP without proof (not generated)
2015-01-28	alpertron	F-PM1	Factor: 28853206693808968464857 / (P-1, B1=500000, B2=15000000, E=12)