P-1 found a factor in stage #2, B1=500000, B2=20000000, E=12.
M15040721 has a factor: 10135277717869225760959 (P-1, B1=500000, B2=20000000, E=12)

2×
3[SUP]2[/SUP]×
7×
31×
11467×
15040721×
15044749
+ 1

74 bits (73.10)

P-1 found a factor in stage #2, B1=500000, B2=20000000, E=12.
M15048053 has a factor: 779549271886429668067009697 (P-1, B1=500000, B2=[B]20000000[/B], E=12)


2[SUP]5[/SUP]×
13×
127×
281×
174893×
15048053×
[B]19952047[/B]
+1

90 bit (89.33)

that's a nice one. :whistle:

P-1 found a factor in stage #2, B1=760000, B2=13680000.
UID: Jwb52z/Clay, M99367627 has a factor: 111236745363658693048154513 (P-1, B1=760000, B2=13680000),

86.524 bits.

P-1 found a factor in stage #2, B1=760000, B2=13680000.
UID: Jwb52z/Clay, M99402031 has a factor: 960298973528588868089863 (P-1, B1=760000, B2=13680000),

79.668 bits.

P-1 found a factor in stage #2, B1=6000000, B2=160000000, E=12.
M14005993 has a factor: 417809407686661544489263 (P-1, B1=6000000, B2=160000000, E=12)

417809 407686 661544 489262 = 2 × 3^2 × 97 × 68813 × 14 005993 × 248 284483

141.4 bits
 

[QUOTE]exponent factor digits bits* k min B1 min B2
40579559
3592039036873131451370283138714871190421073
43
141.366
44259217268392831121825192071639704
2^3 × 3^3 × 11 × 113 × 379 × 2579 × 5857 × 52567 × 596341 × 918555097
596,341
918,555,097[/QUOTE]

I used B1=1000000, B2=20000000
Result had E=12. Brent Suyama helped, I believe

Impressive, that's #20 on the [url=https://www.mersenne.ca/pm1user/1]all-time biggest P-1 list[/url].

[QUOTE=James Heinrich;550022]Impressive, that's #20 on the [url=https://www.mersenne.ca/pm1user/1]all-time biggest P-1 list[/url].[/QUOTE]

I also have the 4th. :)

[QUOTE=petrw1;550031]I also have the 4th. :)[/QUOTE]And 35, 36, 81... But I got #117, so there! :flex:

Maybe I should extend that page to show beyond 100 so I feel special again... :down:

P-1 found a factor in stage #1, B1=760000.
UID: Jwb52z/Clay, M99621787 has a factor: 39763146304338863464275129264073 (P-1, B1=760000),

104.971 bits.