1 217 521 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
346597712753657	15	48.3	old
2270476094759596082525312119	28	90.9	2015-01-05 11:39:50

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	100 / 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	2017-10-05	Oliver Kruse	9A76CE72A82829A1	2	0	1	3
Verified	2017-10-18	Oliver Kruse	9A76CE72A82829A1	2	925149	1	3
Verified	2018-01-03	ATH	9A76CE72A82829A1	2	402506	1	3

P-1 factors

Date	Factor	B1	B2
2015-01-05	2270476094759596082525312119	300000	10000000

History

Date	User	Type	Result
2018-01-03	ATH	C-PRP	M1217521/346597712753657/2270476094759596082525312119 : 9A76CE72A82829A1 PRP: Verified PRP without proof (not generated)
2017-10-18	Oliver Kruse	C-PRP	M1217521/346597712753657/2270476094759596082525312119 : 9A76CE72A82829A1 PRP: Verified PRP without proof (not generated)
2017-10-05	Oliver Kruse	C-PRP	M1217521/346597712753657/2270476094759596082525312119 : 9A76CE72A82829A1 PRP: Verified PRP without proof (not generated)
2017-09-29	Oliver Kruse	C-PRP	M1217521/346597712753657/2270476094759596082525312119 : 9A76CE72A82829A1 PRP without proof (not generated)
2015-01-05	alpertron	F-PM1	Factor: 2270476094759596082525312119 / (P-1, B1=300000, B2=10000000, E=12)