1 847 359 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
18473591	8	24.1	old
1666321512719	13	40.6	2008-07-15 07:47:21
8957970774098203116313	22	72.9	2015-08-29 11:02:16
21792674270783720269697	23	74.2	2015-08-29 11:02:16

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	106 / 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	alpertron	F9EBEFF67D82DAC5	4	0	1	3
Verified	2017-10-20	Oliver Kruse	F9EBEFF67D82DAC5	4	590274	1	3

P-1 factors

Date	Factor	B1	B2
2015-08-29	8957970774098203116313	500000	15000000
2015-08-29	21792674270783720269697	500000	15000000

History

Date	User	Type	Result
2017-10-20	Oliver Kruse	C-PRP	M1847359/18473591/1666321512719/8957970774098203116313/21792674270783720269697 : F9EBEFF67D82DAC5 PRP: Verified PRP without proof (not generated)
2017-09-30	alpertron	C-PRP	M1847359/18473591/1666321512719/8957970774098203116313/21792674270783720269697 : F9EBEFF67D82DAC5 PRP: Verified PRP without proof (not generated)
2015-08-29	alpertron	F-PM1	Factor: 195218139207122436777122219974789910220267161 / (P-1, B1=500000, B2=15000000, E=12)
2008-07-15	J Feitsma	F	Factor: 1666321512719