is 2 1792603 - 1
has 539628 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-L44A930028E2072BBdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual26833.250569.1176 %20598031971863300.99838.1683 %34.248871.6402 %
Target2610.171465.5738 %80006500000.00341.4938 %0.174766.0880 %
Difference+7+33.0791+3.5439 %+2051803+196536330+0.9949+6.6745%+34.0740+5.5522 %

Known prime factors (1 factor, 78.6 bits, 0.00438594% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
17926034653158964107501961762232478.623129787771305400637
11 × 13 × 3061 × 296506629319
2020-01-22306129650662931934,1501,270.82,373.4

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2011-02-07Carsten Kossendeymother9500016387506--0.0144.874%
2014-04-26ANONYMOUSManual testing145000145000--0.0112.408%
2014-10-05JossManual testing180805180805--0.0142.649%
2015-01-10JossManual testing271207271207--0.0213.126%
2015-02-04JossManual testing542414542414--0.0434.035%
2015-03-29JossManual testing596655596655--0.0474.169%
2015-04-08JossManual testing656320656320--0.0524.306%
2015-05-01JossManual testing794147794147--0.0624.585%
2015-05-22JossManual testing873561873561--0.0694.728%
2015-05-26JossManual testing960917960917--0.0764.873%
2015-06-08JossManual testing10570081057008--0.0835.019%
2015-06-25JossManual testing11627081162708--0.0915.168%
2015-07-07JossManual testing12789781278978--0.1015.319%
2015-07-21JossManual testing14068751406875--0.1115.471%
2015-07-28JossManual testing15475621547562--0.1225.625%
2015-09-17JossManual testing17023181702318--0.1345.781%
2015-09-27JossManual testing18725491872549--0.1475.939%
2015-10-02JossManual testing20598032059803--0.1626.098%
2015-10-10mikrMSI364220012345678912--0.80013.529%
2018-10-01JossManual testing205980312548221012---13.192%
2018-10-02JossManual testing205980314340824012---13.413%
2018-10-07JossManual testing205980317926030012--0.92113.782%
2018-10-19JossManual testing205980319718633012--0.99813.939%


Trial Factoring results:
575859606162636465666768
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2003-01-25ANONYMOUSv4_computers212580.021
2016-02-23Mark RoseManual testing2582600.064
2010-04-20Architects Cubeda3_bu22602610.086
2016-02-23Mark RoseManual testing2612620.171
2010-11-18GrunwalderGIMPManual testing212630.890
2016-02-23Mark RoseManual testing2622630.548
2015-05-02snme2pm1Manual testing2632641.095
2015-05-02snme2pm1Manual testing2642652.084
2015-09-13ramgeisManual testing2652664.169
2017-08-25TJAOIManual testing2662678.337
2019-07-24TJAOIManual testing26726816.67


ECM factoring results:
Total ECM effort:38.518 GHz-days
Estimated T-Level:25.718
DigitsB1CompleteFacMiss
201100014.6540.000%
25500001.67418.740%
302500000.14486.623%
3510000000.01099.005%


ECM Summary

B1B2factorcurvesGHz-days
50000500000025017.12
50000500000010.069
250000400000005021.33


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-12-21ANONYMOUSv4_computers44A930028E2072BB0.097
2015-07-18MadPooManual testing44A930028E2072BB0.097


PRP results:
dateuseridcompidcofactorsres64
2020-01-23Niels_Mache_NextcloudSuperDry-X
465315896410750196176223
21C9673DAD0ECB76
2020-01-30Jay G.Macbook
465315896410750196176223
21C9673DAD0ECB76
2020-04-30Chang Chia-Tcheex01
465315896410750196176223
21C9673DAD0ECB76


CERT results:
No CERT results for M1792603


P-1 factor-bounds graph:
B1 = 2059803, B2 = 197186330 (P-1 stage 2)
B1 = 2059803, B2 = 179260300 (P-1 stage 2)
B1 = 3642200, B2 = 123456789 (P-1 stage 2)
B1 = 2059803, B2 = 143408240 (P-1 stage 2)
B1 = 2059803, B2 = 125482210 (P-1 stage 2)
B1 = 3642200 (P-1 stage 1)
B1 = 2059803 (P-1 stage 1)
B1 = 1872549 (P-1 stage 1)
B1 = 1702318 (P-1 stage 1)
B1 = 1547562 (P-1 stage 1)
B1 = 1406875 (P-1 stage 1)
B1 = 1278978 (P-1 stage 1)
B1 = 1162708 (P-1 stage 1)
B1 = 1057008 (P-1 stage 1)
B1 = 960917 (P-1 stage 1)
B1 = 873561 (P-1 stage 1)
B1 = 794147 (P-1 stage 1)
B1 = 656320 (P-1 stage 1)
B1 = 596655 (P-1 stage 1)
B1 = 542414 (P-1 stage 1)
B1 = 271207 (P-1 stage 1)
B1 = 180805 (P-1 stage 1)
B1 = 95000, B2 = 1638750 (P-1 stage 2)
B1 = 145000 (P-1 stage 1)
B1 = 95000 (P-1 stage 1)
102
103
104
105
106
107
102
103
104
105
106
107
108
109
1010
1011
1012
TF factor-bounds graph:
268
267
266
265
264
263
262
261
260
258
this exponent TF target: 61
TF double-checked to: 67
ECM T-Level=25.72 ~= 69-bit
250
260
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280
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Last modified: 2024-02-29T14:28:04+00:00