7 883 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
15767	5	13.9	old
441449	6	18.8	old

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	640 / 640
35	1000000	1566 / 1566
40	3000000	4588 / 4588
45	11000000	6059 / 9201

Estimated T-Level: 43.3 ⓘ

TF below 2^139 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-09-21	Oliver Kruse	75B9C032F9D95ABC	2	0	1	3
Verified	2017-10-12	kkmrkkblmbrbk	75B9C032F9D95ABC	2	4789	1	3
Verified	2020-04-17	Oliver Kruse	8323C5E5DA8E67FA	2	3108	5	3
Verified (Factored)	2022-05-12	Jorge Coveiro	8323C5E5DA8E67FA	1	5472	5	3
Verified	2024-02-03	Wentao Huang	8323C5E5DA8E67FA	2	7729	5	3

History

Date	User	Type	Result
2024-04-09	masser	NF-PM1	B1=50000000000, B2=8775299674841700
2024-02-03	Wentao Huang	C-PRP	M7883/15767/441449 : 8323C5E5DA8E67FA PRP: Verified PRP without proof (small exponent)
2022-05-12	Jorge Coveiro	C-PRP	M7883/15767 : 8323C5E5DA8E67FA PRP: Verified PRP without proof (small exponent)
2021-12-16	Lisander Viaene	NF-PM1	B1=100000000
2020-04-17	Oliver Kruse	C-PRP	M7883/15767/441449 : 8323C5E5DA8E67FA PRP: Verified PRP without proof (small exponent)
2017-10-12	kkmrkkblmbrbk	C-PRP	M7883/15767/441449 : 75B9C032F9D95ABC PRP: Verified PRP without proof (not generated)
2017-09-21	Oliver Kruse	C-PRP	M7883/15767/441449 : 75B9C032F9D95ABC PRP: Verified PRP without proof (not generated)
2017-09-21	Oliver Kruse	C-PRP	M7883/15767/441449 : 75B9C032F9D95ABC PRP without proof (not generated)