1 609 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
2394193	7	21.2	old
15814084061017077487	20	63.8	old
13558431790160061426039191	26	83.5	old
143805067268178342851461157655703	33	106.8	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	160322 / 194238

Estimated T-Level: 64.1 ⓘ

TF below 2^208 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	D9A960D06B54FC5F	4	0	1	3
Verified	2017-10-02	kkmrkkblmbrbk	D9A960D06B54FC5F	4	0	1	3
Verified	2017-12-07	ATH	D9A960D06B54FC5F	4	1507	1	3
Verified	2020-04-17	Oliver Kruse	B32611F6D6F850BB	4	31	5	3
Verified	2020-08-12	_p95holder_	B32611F6D6F850BB	4	292	5	3

History

Date	User	Type	Result
2022-07-26	mikr	NF-PM1	B1=400000000000, B2=1638694652885390100
2022-01-28	Ethan O'Connor	NF-PM1	B1=12000000000, B2=420469999479219690
2022-01-26	Ethan O'Connor	NF-PM1	B1=10000000000, B2=200427308565554070
2021-07-22	ViliamF	NF-PP1	Start=2/7, B1=1000000000, B2=221000000000
2020-08-12	_p95holder_	C-PRP	M1609/2394193/15814084061017077487/13558431790160061426039191/143805067268178342851461157655703 : B32611F6D6F850BB PRP: Verified PRP without proof (small exponent)
2020-04-17	Oliver Kruse	C-PRP	M1609/2394193/15814084061017077487/13558431790160061426039191/143805067268178342851461157655703 : B32611F6D6F850BB PRP: Verified PRP without proof (small exponent)
2017-12-07	ATH	C-PRP	M1609/2394193/15814084061017077487/13558431790160061426039191/143805067268178342851461157655703 : D9A960D06B54FC5F PRP: Verified PRP without proof (small exponent)
2017-10-02	kkmrkkblmbrbk	C-PRP	M1609/2394193/15814084061017077487/13558431790160061426039191/143805067268178342851461157655703 : D9A960D06B54FC5F PRP: Verified PRP without proof (not generated)
2017-09-21	Oliver Kruse	C-PRP	M1609/known_factors : D9A960D06B54FC5F PRP without proof (not generated)
2016-09-07	kkmrkkblmbrbk	NF-PM1	B1=1000000000, B2=100000000000, E=12