1 571 Exponent Status

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

PrimeNet Exponent Status

M_n

Details

Composite, with 2 known prime factors. Cofactor is composite.

Trial Factored to 2⁶⁸

TF target 2⁴⁴

Factored

Factor	Digits	Bits	Date
33788630721577	14	44.9	old
37023157730020091646271	23	75.0	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	154466 / 194238

Estimated T-Level: 64.0 ⓘ

TF below 2^208 is very unlikely to find new factors due to ECM effort.

Status	Proof	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	No proof (small exponent)	2017-09-21	Oliver Kruse	66578AF5A877DFC5	2	0	1	3
Verified	No proof (small exponent)	2017-10-12	kkmrkkblmbrbk	66578AF5A877DFC5	2	809	1	3
Verified	No proof (small exponent)	2020-04-17	Oliver Kruse	AA5D3118025CA901	2	145	5	3
Verified	No proof (small exponent)	2020-08-12	_p95holder_	AA5D3118025CA901	2	953	5	3

History

Date	User	Type	Result
2022-03-29	Joss	NF-PM1	B1=1000000000000
2021-07-21	ViliamF	NF-PP1	Start=2/7, B1=1000000000, B2=221000000000
2021-04-05	Joss	NF-PM1	B1=400000000000
2021-02-27	Joss	NF-PM1	B1=100000000000, B2=100000000000000000
2021-02-15	Joss	NF-PM1	B1=200000000000
2021-02-11	Joss	NF-PM1	B1=120000000000
2021-02-09	Joss	NF-PM1	B1=100000000000
2020-08-12	_p95holder_	C-PRP	M1571/33788630721577/37023157730020091646271 : AA5D3118025CA901
2020-04-17	Oliver Kruse	C-PRP	M1571/33788630721577/37023157730020091646271 : AA5D3118025CA901
2017-10-12	kkmrkkblmbrbk	C-PRP	M1571/33788630721577/37023157730020091646271 : 66578AF5A877DFC5
2017-09-21	Oliver Kruse	C-PRP	M1571/33788630721577/37023157730020091646271 : 66578AF5A877DFC5
2017-09-21	Oliver Kruse	C-PRP	M1571/33788630721577/37023157730020091646271 : 66578AF5A877DFC5
2016-09-07	kkmrkkblmbrbk	NF-PM1	B1=1000000000, B2=100000000000, E=12
1999-05-02	-anonymous-	F-PM1	Factor: 33788630721577
1999-03-26	-anonymous-	F-PM1	Factor: 33788630721577
1999-02-21	-anonymous-	F-PM1	Factor: 33788630721577