1 675 771 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
1756208009	10	30.7	old
2519558565463	13	41.2	2008-07-15 07:45:10
8898907069057	13	43.0	2008-07-15 07:45:10
170177523055941017	18	57.2	2015-05-02 13:08:53
267763018085696484193	21	67.9	2018-02-08 14:25:46

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 (Factored)	2017-10-03	kkmrkkblmbrbk	79CB631E963BCF8F	4	0	1	3
Verified (Factored)	2017-11-14	ATH	79CB631E963BCF8F	4	580397	1	3
Verified	2018-02-10	Oliver Kruse	D25156BF8BE3D67C	5	210877	5	3
Verified	2018-02-11	kkmrkkblmbrbk	D25156BF8BE3D67C	5	1523988	5	3

P-1 factors

Date	Factor	B1	B2
2015-05-02	170177523055941017	500000	15000000

History

Date	User	Type	Result
2018-02-11	kkmrkkblmbrbk	C-PRP	M1675771/1756208009/2519558565463/8898907069057/170177523055941017/267763018085696484193 : D25156BF8BE3D67C PRP: Verified PRP without proof (not generated)
2018-02-10	Oliver Kruse	C-PRP	M1675771/1756208009/2519558565463/8898907069057/170177523055941017/267763018085696484193 : D25156BF8BE3D67C PRP: Verified PRP without proof (not generated)
2018-02-08	Chang Chia-Tche	F-ECM	Factor: 267763018085696484193 / (ECM curve 3, B1=50000, B2=5000000)
2017-11-14	ATH	C-PRP	M1675771/1756208009/2519558565463/8898907069057/170177523055941017 : 79CB631E963BCF8F PRP: Verified PRP without proof (not generated)
2017-10-03	kkmrkkblmbrbk	C-PRP	M1675771/1756208009/2519558565463/8898907069057/170177523055941017 : 79CB631E963BCF8F PRP: Verified PRP without proof (not generated)
2017-10-02	Oliver Kruse	C-PRP	M1675771/1756208009/2519558565463/8898907069057/170177523055941017 : 79CB631E963BCF8F PRP without proof (not generated)
2015-05-02	alpertron	F-PM1	Factor: 170177523055941017 / (P-1, B1=500000, B2=15000000, E=12)
2008-07-15	J Feitsma	F	Factor: 8898907069057
2008-07-15	J Feitsma	F	Factor: 2519558565463