is 2 2703671 - 1
has 813887 decimal digits
takes 0.209 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-L29B2E00309F4CE60double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual26710.990267.1642 %2880002612540701.62467.6105 %12.614869.6631 %
Target2630.590365.0794 %1400011000000.00821.6617 %0.598565.6596 %
Difference+4+10.3999+2.0848 %+274000+260154070+1.6164+5.9488%+12.0163+4.0035 %

Known prime factors (1 factor, 71.1 bits, 0.00263133% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
270367126062200441073626048072271.142481978029891093
3 × 3187 × 111667 × 451439
2009-03-08111667451439207.950.01460.0255

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2003-11-08ANONYMOUSv4_computers2048204800--0.0010.676%
2003-11-28Team Prime Ribv4_computers15000217500--0.0031.690%
2023-01-26USAFSSUSAFSACS288000261254070
skipped known factor: 2606220044107362604807
--1.79010.830%


Trial Factoring results:
5758596061626364656667
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2009-01-30Sturle Sundehummel.ifi2602610.057


ECM factoring results:
Total ECM effort:0.243 GHz-days
DigitsB1CompleteFacMiss


ECM Summary

B1B2factorcurvesGHz-days
10.243


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-05-08ANONYMOUSv4_computers29B2E00309F4CE600.209
1999-04-23Martijn Ottov4_computers29B2E00309F4CE600.209


PRP results:
dateuseridcompidcofactorsres64
2017-10-19Oliver KruseGTX-2
2606220044107362604807
0A358E43DB5B1DB0
2017-12-04kkmrkkblmbrbkc4.xlarge
2606220044107362604807
0A358E43DB5B1DB0


CERT results:
No CERT results for M2703671


P-1 factor-bounds graph:
B1 = 288000, B2 = 261254070 (P-1 stage 2)
B1 = 288000 (P-1 stage 1)
B1 = 15000, B2 = 217500 (P-1 stage 2)
B1 = 15000 (P-1 stage 1)
B1 = 2048, B2 = 204800 (P-1 stage 2)
B1 = 2048 (P-1 stage 1)
102
103
104
105
106
102
103
104
105
106
107
108
109
TF factor-bounds graph:
261
this exponent TF target: 63
TF double-checked to: 67
250
260
270
280
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Last modified: 2024-03-13T02:15:48+00:00