is 2 1789517 - 1
has 538699 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-L1396A7EB56A4E19Adouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26716.604468.6567%36422001234567890.80008.6540%17.404471.3692%2.7124%
PrimeNet2570.010763.1579%80001400000.00122.8143%0.011964.1948%1.0369%
GPU722610.171765.5738%80001300000.00121.4933%0.172866.0879%0.5141%
Difference+6+16.4328+3.0829%+3634200+123326789+0.7988+7.1607%+17.2316+5.2813%+5.2813%

Known prime factors (1 factor, 108.2 bits, 0.00604717% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
178951737669248428929920085782597982699133108.215105249764123307909580581235
5 × 241 × 16067 × 35099 × 150011 × 1032479509
2015-10-0215001110324795099.546e+104.43618.2646

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2011-02-07T12:47:00Carsten Kossendeyleela950001638750---0.014--2.446%
2014-05-03T00:50:00Jocelyn LaroucheManual testing145000145000---0.011--1.098%
2014-10-03T21:04:00Jocelyn LaroucheManual testing180867180867---0.014--1.234%
2015-01-09T22:25:00Jocelyn LaroucheManual testing271300271300---0.021--1.509%
2015-02-15T21:12:00Jocelyn LaroucheManual testing361100361100---0.028--1.724%
2015-02-21T13:42:00Jocelyn LaroucheManual testing397210397210---0.031--1.799%
2015-03-08T04:50:00Jocelyn LaroucheManual testing436931436931---0.034--1.876%
2015-03-15T18:54:00Jocelyn LaroucheManual testing480624480624---0.038--1.955%
2015-04-08T16:59:00Jocelyn LaroucheManual testing581554581554---0.046--2.118%
2015-05-01T17:20:00Jocelyn LaroucheManual testing703679703679---0.055--2.289%
2015-05-07T16:18:00Jocelyn LaroucheManual testing774046774046---0.061--2.377%
2015-05-22T00:28:00Jocelyn LaroucheManual testing851450851450---0.067--2.467%
2015-05-26T18:16:00Jocelyn LaroucheManual testing936595936595---0.074--2.559%
2015-06-08T13:43:00Jocelyn LaroucheManual testing10302541030254---0.081--2.653%
2015-06-25T21:15:00Jocelyn LaroucheManual testing11332791133279---0.089--2.749%
2015-07-07T18:13:00Jocelyn LaroucheManual testing12466061246606---0.098--2.846%
2015-07-21T01:19:00Jocelyn LaroucheManual testing13712661371266---0.108--2.945%
2015-07-27T01:26:00Jocelyn LaroucheManual testing15083921508392---0.119--3.046%
2015-09-15T15:52:00Jocelyn LaroucheManual testing16592311659231---0.131--3.149%
2015-09-27T21:23:20Jocelyn LaroucheManual testing18251541825154---0.144--3.253%
2015-09-30T21:49:35Jocelyn LaroucheManual testing20076692007669---0.158--3.360%
2015-10-02T13:47:59mikrMSI36422001234567891233108.2150.8000.1941.6008.654%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2003-01-25T00:00:00ANONYMOUSv4_computers21258--0.021--
2022-03-08T23:06:26LordJuliusManual testing258260--0.064--
2010-04-21T13:12:00Architects Cubedm1_76l260261--0.086--
2010-10-27T20:37:00GrunwalderGIMPManual testing21263--0.892--
2015-05-03T10:41:00snme2pm1Manual testing263264--1.097--
2015-05-03T10:41:00snme2pm1Manual testing264265--2.088--
2015-09-12T12:52:00ramgeisManual testing265266--4.176--


ECM factoring results:

Old Calculation Method

Total ECM effort:18.258 GHz-days
Estimated T-Level:24.732
DigitsB1CurvesCompleteFacMiss
2011000265 / 1002.6506.972%
2550000265 / 2800.94638.747%

New Calculation Method

Total ECM effort:18.258 GHz-days
Estimated T-Level:24.732
DigitsB1CompleteFacMiss
20110008.5480.019%
25500000.77346.181%
302500000.04895.354%
3510000000.00299.782%


ECM Summary

B1B2factorcurvesGHz-days
50000500000026518.26


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-12-27T00:00:00ANONYMOUSv4_computersF568A088B88473__0.097
1999-03-01T00:00:00Dry Creek Photov4_computers1396A7EB56A4E19A0.097
2015-07-18T18:31:00MadPooManual testing1396A7EB56A4E19A0.097


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-30T15:28:56alpertronManual testing
376692484289299200857825979826991
AB5CBB001BB395__no
2017-10-19T18:02:54Oliver KruseThreadripper
376692484289299200857825979826991
AB5CBB001BB395__no


P-1 factor-bounds graph:
B1 = 3642200, B2 = 123456789 (P-1 stage 2)
B1 = 3642200 (P-1 stage 1)
B1 = 2007669 (P-1 stage 1)
B1 = 1825154 (P-1 stage 1)
B1 = 1659231 (P-1 stage 1)
B1 = 1508392 (P-1 stage 1)
B1 = 1371266 (P-1 stage 1)
B1 = 1246606 (P-1 stage 1)
B1 = 1133279 (P-1 stage 1)
B1 = 1030254 (P-1 stage 1)
B1 = 936595 (P-1 stage 1)
B1 = 851450 (P-1 stage 1)
B1 = 774046 (P-1 stage 1)
B1 = 703679 (P-1 stage 1)
B1 = 581554 (P-1 stage 1)
B1 = 480624 (P-1 stage 1)
B1 = 436931 (P-1 stage 1)
B1 = 397210 (P-1 stage 1)
B1 = 361100 (P-1 stage 1)
B1 = 271300 (P-1 stage 1)
B1 = 180867 (P-1 stage 1)
B1 = 95000, B2 = 1638750 (P-1 stage 2)
B1 = 145000 (P-1 stage 1)
B1 = 95000 (P-1 stage 1)
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1010
TF factor-bounds graph:
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Last modified: 2022-03-08T23:06:26+00:00