447 217 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
869389849	9	29.7	old
2576233102022335784317963697	28	91.1	2020-07-08 10:34:50

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	219 / 640

Estimated T-Level: 26.7 ⓘ

TF below 2^84 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified (Factored)	2017-09-24	Oliver Kruse	D2782330412B112D	1	0	1	3
Verified (Factored)	2017-09-24	Oliver Kruse	D2782330412B112D	1	0	1	3
Verified (Factored)	2017-11-07	kkmrkkblmbrbk	D2782330412B112D	1	187947	1	3
Verified (Factored)	2020-04-18	Oliver Kruse	59ECB52F3133C9EB	1	397600	5	3
Verified	2020-07-08	pew	59ECB52F3133C9EB	2	298356	5	3

History

Date	User	Type	Result
2020-07-08	pew	C-PRP	M447217/869389849/2576233102022335784317963697 : 59ECB52F3133C9EB PRP: Verified PRP without proof (small exponent)
2020-07-08	nordi	F-ECM	Factor: 2576233102022335784317963697 / (ECM curve 19, B1=250000, B2=25000000, Sigma=6197404621907478)
2020-04-18	Oliver Kruse	C-PRP	M447217/869389849 : 59ECB52F3133C9EB PRP: Verified PRP without proof (small exponent)
2017-11-07	kkmrkkblmbrbk	C-PRP	M447217/869389849 : D2782330412B112D PRP: Verified PRP without proof (small exponent)
2017-09-24	Oliver Kruse	C-PRP	M447217/869389849 : D2782330412B112D PRP: Verified PRP without proof (not generated)
2017-09-24	Oliver Kruse	C-PRP	M447217/869389849 : D2782330412B112D PRP: Verified PRP without proof (not generated)
2016-03-17	alpertron	NF-PM1	B1=3000000, B2=100000000, E=12