is 2 1784053 - 1
has 537054 decimal digits
takes 0.097 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L151D481B7A769C2Fdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26716.655368.6567%247540024754000.19473.5983%16.850069.7845%1.1278%
PrimeNet2570.010863.1579%80001400000.00122.8127%0.012064.1942%1.0363%
GPU722610.172265.5738%80001300000.00121.4924%0.173366.0875%0.5138%
Difference+6+16.4831+3.0829%+2467400+2345400+0.1936+2.1059%+16.6767+3.6970%+3.6970%

Known prime factors (1 factor, 96.4 bits, 0.00540514% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
17840531067766887436938306559702752173096.43129925312965392236288936
23 × 3 × 132 × 2927 × 30269 × 161783 × 514739
2015-06-021617835147391.222e+100.01420.0259

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2011-02-07T12:33:00Carsten Kossendeyleela950001615000---0.014--2.436%
2014-04-10T20:52:00ANONYMOUSManual testing100000100000---0.008--0.891%
2014-05-09T20:32:00Jocelyn LaroucheManual testing135977135977---0.011--1.060%
2014-09-19T20:39:00Jocelyn LaroucheManual testing171954171954---0.014--1.201%
2015-06-02T12:35:00mikrMSI247540024754003096.4310.1950.1940.3893.598%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2003-01-25T00:00:00ANONYMOUSv4_computers21258--0.022--
2010-04-21T13:12:00Architects Cubedm1_76l260261--0.086--
2010-10-16T22:17:00GrunwalderGIMPManual testing21263--0.895--
2015-05-14T21:29:00snme2pm1Manual testing263264--1.100--
2015-05-14T21:29:00snme2pm1Manual testing264265--2.094--


ECM factoring results:

Old Calculation Method

Total ECM effort:17.770 GHz-days
Estimated T-Level:24.607
DigitsB1CurvesCompleteFacMiss
2011000258 / 1002.5807.480%
2550000258 / 2800.92139.729%

New Calculation Method

Total ECM effort:17.770 GHz-days
Estimated T-Level:24.607
DigitsB1CompleteFacMiss
20110008.3230.024%
25500000.75247.133%
302500000.04695.474%
3510000000.00299.788%


ECM Summary

B1B2factorcurvesGHz-days
50000500000025817.77


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-12-13T00:00:00ANONYMOUSv4_computers151D481B7A769C2F0.097


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-03T15:01:50Oliver KruseGTX-2
106776688743693830655970275217
BEA77219B1091A__no
2017-11-04T21:06:11ATHec2-1xf
106776688743693830655970275217
BEA77219B1091A__no


P-1 factor-bounds graph:
B1 = 2475400 (P-1 stage 1)
B1 = 95000, B2 = 1615000 (P-1 stage 2)
B1 = 171954 (P-1 stage 1)
B1 = 135977 (P-1 stage 1)
B1 = 100000 (P-1 stage 1)
B1 = 95000 (P-1 stage 1)
103
104
105
106
107
103
104
105
106
107
TF factor-bounds graph:
267
265
264
263
261
258
250
260
270
280
290
2100
Last modified: 2020-10-30T10:29:33+00:00