is 2 2779537 - 1
has 836725 decimal digits
takes 0.215 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
Actual26710.690267.1642 %3200002612540701.62807.7555 %12.318269.7108 %
Target2630.574265.0794 %1500012000000.00891.7474 %0.583165.6896 %
Difference+4+10.1160+2.0848 %+305000+260054070+1.6191+6.0081%+11.7351+4.0212 %

Known prime factors (2 factors, 98.6 bits, 0.00354706% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
2779537911688137929.764164
22 × 41
-4412.573e-116.737e-79.117e-7
27795375239215331469199503212168.82894246187970680
23 × 5 × 17 × 41 × 541 × 6248471
2018-04-24541624847121.4440.03820.0712

1 Composite Factors:
P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2022-12-03USAFSSManual testing320000261254070
skipped known factor: 911688137
skipped known factor: 523921533146919950321
--1.79410.996%


Trial Factoring results:
5758596061626364656667
No TF results for M2779537


ECM factoring results:
Total ECM effort:0.414 GHz-days
Estimated T-Level:0.769
DigitsB1CompleteFacMiss
20110000.15485.740%
25500000.01498.587%


ECM Summary

B1B2factorcurvesGHz-days
50000500000030.312
50000500000010.101


Lucas-Lehmer results:
No L-L results for M2779537


PRP results:
dateuseridcompidcofactorsres64
2017-10-21Oliver KruseGTX-1
911688137
5FF44A4CAC4F0122
2017-12-06kkmrkkblmbrbkc4.xlarge
911688137
5FF44A4CAC4F0122
2018-04-24ATHec2-PRPCF
911688137
523921533146919950321
5FF44A4CAC4F0122


CERT results:
No CERT results for M2779537


P-1 factor-bounds graph:
B1 = 320000, B2 = 261254070 (P-1 stage 2)
B1 = 320000 (P-1 stage 1)
100
101
102
103
104
105
106
100
101
102
103
104
105
106
107
108
109
TF factor-bounds graph:
this exponent TF target: 63
TF double-checked to: 67
ECM T-Level=0.77 ~= -14-bit
250
260
270
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Last modified: 2024-02-09T03:30:02+00:00