825 191 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
222100936584704995783387271	27	87.5	2014-03-13 21:34:52

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	Shift
Verified (Factored)		David Slowinski	1CB9	0
Verified (Factored)		Paul Victor Novarese	110D8843C71FFCB9	0
Verified (Factored)		Jeff Woods	110D8843C71FFCB9	0

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-09-28	Oliver Kruse	2A3F5F8666682BE1	1	0	1	3
Verified	2017-10-14	Oliver Kruse	2A3F5F8666682BE1	1	369722	1	3
Verified	2017-12-18	ATH	2A3F5F8666682BE1	1	503013	1	3
Unverified (Reliable)	2020-04-21	Oliver Kruse	140C379BD1E0E3__	1	332152	5	3

P-1 factors

Date	Factor	B1	B2
2014-03-13	222100936584704995783387271	8129770	357709880

History

Date	User	Type	Result
2020-04-21	Oliver Kruse	C-PRP	M825191/222100936584704995783387271 : 140C379BD1E0E3__ PRP: Unverified (Reliable) PRP without proof (small exponent)
2017-12-18	ATH	C-PRP	M825191/222100936584704995783387271 : 2A3F5F8666682BE1 PRP: Unverified (Reliable) PRP without proof (small exponent)
2017-10-14	Oliver Kruse	C-PRP	M825191/222100936584704995783387271 : 2A3F5F8666682BE1 PRP: Unverified (Reliable) PRP without proof (small exponent)
2017-09-28	Oliver Kruse	C-PRP	M825191/222100936584704995783387271 : 2A3F5F8666682BE1 PRP: Unverified (Reliable) PRP without proof (not generated)
2016-03-17	alpertron	NF-PM1	B1=300000, B2=10000000, E=12
2014-03-13	mikr	F-PM1	Factor: 222100936584704995783387271
2010-06-02	Architects Cubed	NF	no factor from 2^60 to 2^61
2008-11-05	markr	NF-PM1	B1=1000000, B2=40000000, E=12
2008-10-12	Sturle Sunde	NF	no factor from 2^59 to 2^60
2008-10-12	Sturle Sunde	NF	no factor from 2^58 to 2^59