1 850 089 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
321915487	9	28.3	old

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	107 / 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	2017-10-04	Oliver Kruse	7D5442DC925FDC6F	1	0	1	3
Verified	2017-11-06	ATH	7D5442DC925FDC6F	1	1212133	1	3

History

Date	User	Type	Result
2021-03-30	riccardo uberti	NF-PM1	B1=6000000, B2=120000000, E=12
2021-03-28	Conductor	F-ECM	Factor: 321915487 / (ECM curve 1, B1=50000, B2=5000000, Sigma=2578148534466300)
2017-11-06	ATH	C-PRP	M1850089/321915487 : 7D5442DC925FDC6F PRP: Verified PRP without proof (not generated)
2017-10-04	Oliver Kruse	C-PRP	M1850089/321915487 : 7D5442DC925FDC6F PRP: Verified PRP without proof (not generated)
2016-03-16	alpertron	NF-PM1	B1=500000, B2=15000000, E=12