is 2 13220749 - 1
has 3979843 decimal digits
takes 5.400 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L-unknown--unknown-
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual2672.247564.1791 %3000002101291506.94878.8841 %9.196267.3615 %
Target2684.508464.7059 %90000120000000.43763.1767 %4.946165.8271 %
Difference-1-2.2609-0.5268 %+210000+198129150+6.5111+5.7074%+4.2502+1.5344 %

Known prime factors (2 factors, 143.4 bits, 0.00108497% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
132207492372540594162943104332167.6858972791912784
24 × 7 × 19 × 32299 × 130547
2001-08-24322991305473.79590.02230.0389
13220749638279710405556424652732375.7572413931731120364
22 × 7 × 13 × 71 × 673 × 6131 × 22637
2001-08-24613122637606.840.00420.0074

1 Composite Factors:
P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2001-08-24ANONYMOUSv4_computers44143.442-0.000%
2002-03-24ANONYMOUSv4_computers44143.442-0.000%
2022-06-11nordisweet16_30.8b14300000300000
skipped known factor: 237254059416294310433
skipped known factor: 63827971040555642465273
--0.1781.919%
2022-06-18nordisweet16_30.8b14300000210129150
skipped known factor: 237254059416294310433
skipped known factor: 63827971040555642465273
--8.5328.130%


Trial Factoring results:
575859606162636465666768
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2000-05-17ANONYMOUSv4_computers212640.149
2022-04-10LordJuliusManual testing264267


ECM factoring results:
Total ECM effort:0.455 GHz-days
DigitsB1CompleteFacMiss


ECM Summary

B1B2factorcurvesGHz-days
10.455
10.455


Lucas-Lehmer results:
No L-L results for M13220749


PRP results:
dateuseridcompidcofactorsres64
2022-06-20Poaooffice-CN2
237254059416294310433
63827971040555642465273
D388FED00922BCEB


CERT results:
dateuseridcompid
2022-06-20curtiscwcm126--01s


P-1 factor-bounds graph:
B1 = 300000, B2 = 210129150 (P-1 stage 2)
B1 = 300000 (P-1 stage 1)
102
103
104
105
106
102
103
104
105
106
107
108
109
TF factor-bounds graph:
267
264
this exponent TF target: 68
TF double-checked to: 67
250
260
270
280
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Last modified: 2024-03-13T02:15:48+00:00