2 164 429 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
15129358711	11	33.8	old
21378213741021485979937	23	74.2	2016-04-03 23:24:40

ECM

Digits	B1	Curves
25	50000	98 / 280

Estimated T-Level: 21.8 ⓘ

TF below 2^67 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-10-09	Oliver Kruse	46E3C4750016F9FC	2	0	1	3
Verified	2017-11-19	kkmrkkblmbrbk	46E3C4750016F9FC	2	425124	1	3

P-1 factors

Date	Factor	B1	B2
2016-04-03	21378213741021485979937	500000	15000000

History

Date	User	Type	Result
2017-11-19	kkmrkkblmbrbk	C-PRP	M2164429/15129358711/21378213741021485979937 : 46E3C4750016F9FC PRP: Verified PRP without proof (not generated)
2017-10-09	Oliver Kruse	C-PRP	M2164429/15129358711/21378213741021485979937 : 46E3C4750016F9FC PRP: Verified PRP without proof (not generated)
2016-04-03	alpertron	F-PM1	Factor: 21378213741021485979937 / (P-1, B1=500000, B2=15000000, E=12)