1 291 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
998943080897	12	39.9	old
84051400422953302189544581841	29	96.1	old

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	640 / 640
35	1000000	1566 / 1566
40	3000000	4588 / 4588
45	11000000	9201 / 9201
50	44000000	16550 / 16550
55	110000000	40830 / 40830
60	260000000	105362 / 105362
65	800000000	72762 / 194238

Estimated T-Level: 61.9 ⓘ

TF below 2^201 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-09-27	Oliver Kruse	765D62F0248EC470	2	0	1	3
Verified	2017-10-09	Chang Chia-Tche	765D62F0248EC470	2	0	1	3
Verified	2017-10-12	kkmrkkblmbrbk	765D62F0248EC470	2	437	1	3
Verified	2020-04-17	Oliver Kruse	91467BA1E6089CC2	2	476	5	3
Verified	2020-08-12	_p95holder_	91467BA1E6089CC2	2	176	5	3

History

Date	User	Type	Result
2021-07-19	ViliamF	NF-PP1	Start=2/7, B1=1000000000, B2=221000000000
2021-03-27	nordi	NF-PM1	B1=1000000000000, B2=2232843418649129478
2020-08-12	_p95holder_	C-PRP	M1291/998943080897/84051400422953302189544581841 : 91467BA1E6089CC2 PRP: Verified PRP without proof (small exponent)
2020-04-17	Oliver Kruse	C-PRP	M1291/998943080897/84051400422953302189544581841 : 91467BA1E6089CC2 PRP: Verified PRP without proof (small exponent)
2017-10-12	kkmrkkblmbrbk	C-PRP	M1291/998943080897/84051400422953302189544581841 : 765D62F0248EC470 PRP: Verified PRP without proof (not generated)
2017-10-09	Chang Chia-Tche	C-PRP	M1291/known_factors : 765D62F0248EC470 PRP: Verified PRP without proof (not generated)
2017-09-27	Oliver Kruse	C-PRP	M1291/998943080897/84051400422953302189544581841 : 765D62F0248EC470 PRP: Verified PRP without proof (not generated)
2017-09-25	csaba	C-PRP	M1291/known_factors : 765D62F0248EC470 PRP without proof (not generated)
2016-09-07	kkmrkkblmbrbk	NF-PM1	B1=1000000000, B2=100000000000, E=12