is 2 6552197 - 1
has 1972408 decimal digits
takes 1.228 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-LE2FD8A153E759C79double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual2674.535065.6716 %30000300000.00820.5305 %4.543165.8537 %
Target2674.535065.6716 %4000040000000.06952.0929 %4.604566.3901 %
Difference----10000-3970000-0.0614-1.5624 %-0.0614-0.5363 %

Known prime factors (1 factor, 81.7 bits, 0.00124694% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
655219739337192504055848699392172581.702300183224833257064
23 × 13 × 292 × 277 × 1579 × 7846847
2011-05-2715797846847110,7240.11660.2170

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2001-10-25ANONYMOUSv4_computers3000030000--0.0080.530%
2011-05-27Carsten Kossendeymother2581.7020.2910.000%


Trial Factoring results:
5758596061626364656667
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
1998-07-21ANONYMOUSv4_computers212610.023
1998-07-29ANONYMOUSv4_computers212620.047
2003-02-24David Campeauv4_computers212630.150


ECM factoring results:
No ECM results for M6552197


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-06-26ANONYMOUSv4_computersE2FD8A153E759C791.228
2002-04-20ANONYMOUSv4_computersE2FD8A153E759C791.228


PRP results:
dateuseridcompidcofactorsres64
2017-12-28Oliver KruseGTX-6
3933719250405584869939217
ED14273F681286F7
2018-10-18pewlaptop
3933719250405584869939217
ED14273F681286F7


CERT results:
No CERT results for M6552197


P-1 factor-bounds graph:
B1 = 30000 (P-1 stage 1)
102
103
104
105
102
103
104
105
106
107
TF factor-bounds graph:
263
262
261
this exponent TF target: 67
TF double-checked to: 67
250
260
270
280
290
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Last modified: 2024-03-13T02:15:48+00:00