is 2 1791637 - 1
has 539337 decimal digits
takes 0.097 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-L7A3BC19B1877532Edouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual26716.584868.6567 %500000150000000.10155.0557 %16.686370.2413 %
Target2610.171565.5738 %80006500000.00341.4937 %0.174866.0880 %
Difference+6+16.4133+3.0829 %+492000+14350000+0.0981+3.5620%+16.5114+4.1533 %

Known prime factors (1 factor, 72.9 bits, 0.00407111% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
179163790568976197352603032872272.9402527548163979439
3 × 1933 × 514967 × 846383
2008-08-31514967846383533.780.04190.0824

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2016-03-16alpertronManual testing5000001500000012---8.844%


Trial Factoring results:
5758596061626364656667
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2003-01-25ANONYMOUSv4_computers212580.021


ECM factoring results:
Total ECM effort:38.714 GHz-days
Estimated T-Level:25.715
DigitsB1CompleteFacMiss
201100014.9540.000%
25500001.69018.461%
302500000.14386.673%
3510000000.01099.020%


ECM Summary

B1B2factorcurvesGHz-days
10.052
50000500000026418.19
250000400000004820.47


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-12-21ANONYMOUSv4_computers7A3BC19B1877532E0.097


PRP results:
dateuseridcompidcofactorsres64
2017-10-03Oliver KruseGTX-1
9056897619735260303287
9A6935BDB771731E
2017-11-05kkmrkkblmbrbkold
9056897619735260303287
9A6935BDB771731E


CERT results:
No CERT results for M1791637


P-1 factor-bounds graph:
B1 = 500000, B2 = 15000000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
104
105
106
104
105
106
107
108
TF factor-bounds graph:
258
this exponent TF target: 61
TF double-checked to: 67
ECM T-Level=25.72 ~= 69-bit
250
260
270
280
JSON version of this page
Last modified: 2024-03-03T02:29:32+00:00