is 2 2739761 - 1
has 824751 decimal digits
takes 0.212 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L-unknown--unknown-
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual26710.845467.1642 %2550001915867801.19607.1844 %12.041469.5232 %
Target2630.582565.0794 %1400012000000.00881.7078 %0.591365.6757 %
Difference+4+10.2629+2.0848 %+241000+190386780+1.1872+5.4766%+11.4501+3.8475 %

Known prime factors (2 factors, 97.2 bits, 0.00354786% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
2739761328771321928.29360
22 × 3 × 5
-451.305e-114.541e-79.117e-7
27397615547875092043095960972168.910101247428006368
25 × 7 × 451997446457
2018-04-163245199744645721.7562,757.95,151.0

1 Composite Factors:
P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2022-11-21USAFSSUSAFSACS255000191586780
skipped known factor: 328771321
--1.31810.306%


Trial Factoring results:
5758596061626364656667
No TF results for M2739761


ECM factoring results:
Total ECM effort:0.304 GHz-days
Estimated T-Level:0.577
DigitsB1CompleteFacMiss
20110000.11589.102%
25500000.01198.938%


ECM Summary

B1B2factorcurvesGHz-days
50000500000030.304


Lucas-Lehmer results:
No L-L results for M2739761


PRP results:
dateuseridcompidcofactorsres64
2017-10-20Oliver KruseGTX-1
328771321
754C7BECF454D35E
2017-12-05kkmrkkblmbrbkc4.xlarge
328771321
754C7BECF454D35E
2018-04-19Oliver KruseGTX-0
328771321
554787509204309596097
754C7BECF454D35E


CERT results:
No CERT results for M2739761


P-1 factor-bounds graph:
B1 = 255000, B2 = 191586780 (P-1 stage 2)
B1 = 255000 (P-1 stage 1)
100
101
102
103
104
105
106
100
101
102
103
104
105
106
107
108
109
1010
1011
1012
TF factor-bounds graph:
this exponent TF target: 63
TF double-checked to: 67
ECM T-Level=0.58 ~= -15-bit
250
260
270
JSON version of this page
Last modified: 2024-02-09T03:30:02+00:00