1 901 Exponent Status

Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

M_n

Status

Details

Composite, with 4 known prime factors. Cofactor is composite.

Factored

Factor	Digits	Bits	Date
12147391	8	23.5	old
516125303	9	28.9	old
46956007702768755352376009	26	85.3	old
711036999248971443186001729441	30	99.2	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	68000 / 194238

Estimated T-Level: 61.8 ⓘ

TF below 2^200 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	9C2E54C3ACD85BD6	4	0	1	3
Verified	2017-10-02	kkmrkkblmbrbk	9C2E54C3ACD85BD6	4	0	1	3
Verified	2017-12-07	ATH	9C2E54C3ACD85BD6	4	1248	1	3
Verified	2020-04-17	Oliver Kruse	E3459703B506D98C	4	212	5	3
Verified	2020-08-12	_p95holder_	E3459703B506D98C	4	52	5	3

History

Date	User	Type	Result
2022-12-13	mikr	NF-PM1	B1=400000000000, B2=2574610952249956620
2021-07-25	ViliamF	NF-PP1	Start=2/7, B1=1000000000, B2=221000000000
2020-08-12	_p95holder_	C-PRP	M1901/12147391/516125303/46956007702768755352376009/711036999248971443186001729441 : E3459703B506D98C PRP: Verified PRP without proof (small exponent)
2020-04-17	Oliver Kruse	C-PRP	M1901/12147391/516125303/46956007702768755352376009/711036999248971443186001729441 : E3459703B506D98C PRP: Verified PRP without proof (small exponent)
2017-12-07	ATH	C-PRP	M1901/12147391/516125303/46956007702768755352376009/711036999248971443186001729441 : 9C2E54C3ACD85BD6 PRP: Verified PRP without proof (small exponent)
2017-10-02	kkmrkkblmbrbk	C-PRP	M1901/12147391/516125303/46956007702768755352376009/711036999248971443186001729441 : 9C2E54C3ACD85BD6 PRP: Verified PRP without proof (not generated)
2017-09-21	Oliver Kruse	C-PRP	M1901/known_factors : 9C2E54C3ACD85BD6 PRP without proof (not generated)
2016-09-07	kkmrkkblmbrbk	NF-PM1	B1=1000000000, B2=100000000000, E=12