is 2 5303297 - 1
has 1596452 decimal digits
takes 0.837 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-L708E75D8004FB8AEdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual26811.239266.1765 %1000000225000000.49726.0534 %11.736468.2239 %
Target2662.784865.1515 %3200030000000.04442.0266 %2.829165.8578 %
Difference+2+8.4544+1.0250 %+968000+19500000+0.4528+4.0268%+8.9073+2.3662 %

Known prime factors (1 factor, 71.3 bits, 0.00134486% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
530329729518777087434194327992271.322278305901851567
5099 × 10337 × 5280109
2019-05-24103375280109103.170.06810.1230

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2009-08-21Carsten Kossendeymother25000343750--0.0111.634%
2010-09-06Squeeky_SquirrelP4_2600600009900006--0.0282.642%
2019-05-24KingFactoringMachine10000002250000022271.3220.4977.240%


Trial Factoring results:
575859606162636465666768
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
1998-03-31ANONYMOUSv4_computers212610.029
1998-04-05ANONYMOUSv4_computers212620.058
2009-06-02GrunwalderGIMPManual testing2622630.185
2014-12-23VictordeHollanderManual testing2632651.075
2015-08-15snme2pm1Manual testing2652661.409
2016-06-10Gordon SpenceManual testing2662672.818
2018-06-19ramgeisManual testing2672685.636


ECM factoring results:
Total ECM effort:2.161 GHz-days
Estimated T-Level:1.731
DigitsB1CompleteFacMiss
20110000.34670.740%
25500000.03296.848%
302500000.00299.798%


ECM Summary

B1B2factorcurvesGHz-days
50000500000092.161


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-07-11ANONYMOUSv4_computers708E75D8004FB8AE0.837
2000-08-17ANONYMOUSv4_computers708E75D8004FB8AE0.837


PRP results:
dateuseridcompidcofactorsres64
2019-05-29vnatinVIR7-1261
2951877708743419432799
5BBB8C472C292656
2019-05-29ATHec2-PRPCFDC
2951877708743419432799
5BBB8C472C292656


CERT results:
No CERT results for M5303297


P-1 factor-bounds graph:
B1 = 1000000, B2 = 22500000 (P-1 stage 2)
B1 = 1000000 (P-1 stage 1)
B1 = 60000, B2 = 990000 (P-1 stage 2)
B1 = 60000 (P-1 stage 1)
B1 = 25000, B2 = 343750 (P-1 stage 2)
B1 = 25000 (P-1 stage 1)
103
104
105
106
103
104
105
106
107
108
TF factor-bounds graph:
268
267
266
265
263
262
261
this exponent TF target: 66
TF double-checked to: 67
ECM T-Level=1.73 ~= -11-bit
250
260
270
280
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Last modified: 2024-03-13T02:15:48+00:00