is 2 1546939 - 1
has 465676 decimal digits
takes 0.069 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L5463F40143F8FAF0double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26719.208268.6567%500000150000000.08354.9668%19.291870.2135%1.5568%
PrimeNet2570.012463.1579%65001100000.00082.4195%0.013264.0493%0.8914%
GPU722610.198665.5738%6500600000.00061.0485%0.199265.9347%0.3609%
Difference+6+19.0096+3.0829%+493500+14940000+0.0829+3.9184%+19.0926+4.2788%+4.2788%

Known prime factors (1 factor, 70.1 bits, 0.00453447% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
154693913058581138312835498812270.145422078088997460
22 × 5 × 7 × 3014843492839
2009-04-2373014843492839215.3610,63819,870

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2003-09-29T00:00:00Team Prime Ribv4_computers20000290000---0.002--0.993%
2016-03-16T12:28:46alpertronManual testing5000001500000012---0.084--4.967%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-10-18T00:00:00ANONYMOUSv4_computers21257--0.012--
2003-08-08T00:00:00ANONYMOUSv4_computers21258--0.025--


ECM factoring results:

Old Calculation Method

Total ECM effort:13.914 GHz-days
Estimated T-Level:24.446
DigitsB1CurvesCompleteFacMiss
2011000249 / 1002.4908.188%
2550000249 / 2800.88941.030%

New Calculation Method

Total ECM effort:13.914 GHz-days
Estimated T-Level:24.446
DigitsB1CompleteFacMiss
20110009.5770.007%
25500000.88641.225%
302500000.05694.564%
3510000000.00399.739%


ECM Summary

B1B2factorcurvesGHz-days
10.00000e+0
50000500000024913.91


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-11-21T00:00:00ANONYMOUSv4_computers5463F40143F8FAF00.069


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-01T18:00:26Oliver KruseGTX-0
1305858113831283549881
005DC385C78A3F__no
2017-10-30T16:10:49kkmrkkblmbrbkold
1305858113831283549881
005DC385C78A3F__no


P-1 factor-bounds graph:
B1 = 500000, B2 = 15000000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
B1 = 20000, B2 = 290000 (P-1 stage 2)
B1 = 20000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2019-07-26T09:11:03+00:00