is 2 1473319 - 1
has 443514 decimal digits
takes 0.056 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L27455A5D0C78A871double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26720.168068.6567%500000150000000.07144.9377%20.239470.2043%1.5476%
PrimeNet2560.006562.5000%70001200000.00072.9130%0.007263.5924%1.0924%
GPU722600.104265.0000%65001000000.00061.4478%0.104965.5067%0.5067%
Difference+7+20.0638+3.6567%+493500+14900000+0.0708+3.4899%+20.1345+4.6976%+4.6976%

Known prime factors (1 factor, 67.3 bits, 0.00457111% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
14733191877143273372593219192167.34763704576991561
3 × 11 × 1930441727017
2009-11-0811193044172701734.2255,822.710,875

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2003-09-29T00:00:00Team Prime Ribv4_computers20000270000---0.002--0.962%
2016-03-17T19:14:48alpertronManual testing5000001500000012---0.071--4.938%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2001-05-20T00:00:00Jocelyn Larouchev4_computers21257--0.013--
2003-07-30T00:00:00ANONYMOUSv4_computers21258--0.026--


ECM factoring results:

Old Calculation Method

Total ECM effort:11.773 GHz-days
Estimated T-Level:24.429
DigitsB1CurvesCompleteFacMiss
2011000248 / 1002.4808.270%
2550000248 / 2800.88641.177%

New Calculation Method

Total ECM effort:11.773 GHz-days
Estimated T-Level:24.429
DigitsB1CompleteFacMiss
20110009.5380.007%
25500000.88341.372%
302500000.05694.585%
3510000000.00399.740%


ECM Summary

B1B2factorcurvesGHz-days
10.00000e+0
50000500000024811.77


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-11-14T00:00:00ANONYMOUSv4_computers27455A5D0C78A8710.056


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-01T05:04:16Oliver KruseGTX-2
187714327337259321919
F66DAA94D141F0__no
2017-10-28T06:38:15kkmrkkblmbrbkc4.xlarge
187714327337259321919
F66DAA94D141F0__no


P-1 factor-bounds graph:
B1 = 500000, B2 = 15000000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
B1 = 20000, B2 = 270000 (P-1 stage 2)
B1 = 20000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2019-04-19T08:39:09+00:00