425 083 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
847127899192094932228153409	27	89.5	2019-05-06 09:04:19

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	202 / 640

Estimated T-Level: 26.6 ⓘ

TF below 2^83 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		David Slowinski	7C36	0
Verified (Factored)		David Brlej	3B766CDD7DC57C36	0
Verified (Factored)		Lance Optican	3B766CDD7DC57C36	0
Verified (Factored)		Eivind Triel	3B766CDD7DC57C36	169191
Verified (Factored)	2016-06-01	MadPoo	3B766CDD7DC57C36	112362

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2019-05-06	ATH	C2F80E7BBB790A0D	1	137195	5	3
Verified	2019-05-07	kkmrkkblmbrbk	C2F80E7BBB790A0D	1	112359	5	3

History

Date	User	Type	Result
2019-05-07	kkmrkkblmbrbk	C-PRP	M425083/847127899192094932228153409 : C2F80E7BBB790A0D PRP: Verified PRP without proof (small exponent)
2019-05-06	ATH	C-PRP	M425083/847127899192094932228153409 : C2F80E7BBB790A0D PRP: Verified PRP without proof (small exponent)
2019-05-06	alex	F-ECM	Factor: 847127899192094932228153409 / (ECM curve 52, B1=250000, B2=25000000, Sigma=1265623945851251)
2018-12-09	Gordon Spence	NF	no factor from 2^65 to 2^66
2018-01-07	BloodERazor	NF	no factor from 2^64 to 2^65
2016-06-01	MadPoo	C-LL	3B766CDD7DC57C36
2016-02-23	Mark Rose	NF	no factor from 2^58 to 2^60
2015-11-15	Gordon Spence	NF	no factor from 2^63 to 2^64
2015-11-15	Gordon Spence	NF	no factor from 2^62 to 2^63
2015-07-15	NR	NF	no factor from 2^61 to 2^62
2012-08-31	markr	NF-PM1	B1=10000000, B2=400000000, E=12
2012-04-20	Sid & Andy	NF	no factor from 2^60 to 2^61
2012-03-10	Joss	NF-PM1	B1=1259102
2011-08-06	Joss	NF-PM1	B1=1007281
2010-07-30	Rob_Dee	NF-PM1	B1=1000000, B2=2000000, E=6
2010-07-29	Rob_Dee	NF-PM1	B1=500000, B2=1000000