is 2 4605197 - 1
has 1386303 decimal digits
takes 0.606 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L5669DDD4B430D21Edouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual273415.366568.4932 %430000011096449650116.197810.5143 %531.564271.8059 %
Target2651.584264.6154 %2800030000000.03632.1875 %1.620565.3894 %
Difference+8+413.7822+3.8778 %+4272000+11093449650+116.1615+8.3268%+529.9437+6.4165 %

Known prime factors:
No known factors for M4605197

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2001-10-13ANONYMOUSv4_computers2000002000000--0.0574.117%
2021-10-29Aaron HavilandManual testing4800001440000012--0.2496.753%
2023-02-20Sid & AndyMagic_8_Ball430000011096449650--135.117.816%


Trial Factoring results:
5758596061626364656667686970717273
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2001-08-18ANONYMOUSv4_computers212610.033
2010-08-10markrut2612620.067
2011-12-09GrunwalderGIMPManual testing212630.347
2016-02-23Mark RoseManual testing2622630.213
2015-01-15JayderManual testing2632640.426
2015-01-16monstManual testing2642650.811
2015-07-04snme2pm1Manual testing2652661.623
2018-05-01Gordon SpenceManual testing2662673.245
2018-09-28chuenkitManual testing2672686.491
2021-03-22ANONYMOUSManual testing26827190.87
2021-03-24ANONYMOUSManual testing271273311.6


ECM factoring results:
Total ECM effort:1.603 GHz-days
Estimated T-Level:1.731
DigitsB1CompleteFacMiss
20110000.34670.740%
25500000.03296.848%
302500000.00299.798%


ECM Summary

B1B2factorcurvesGHz-days
50000500000091.603


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2015-11-14MadPooManual testing5669DDD4B430D21E0.638


PRP results:
No PRP results for M4605197


CERT results:
No CERT results for M4605197


P-1 factor-bounds graph:
B1 = 4300000, B2 = 11096449650 (P-1 stage 2)
B1 = 4300000 (P-1 stage 1)
B1 = 480000, B2 = 14400000 (P-1 stage 2)
B1 = 480000 (P-1 stage 1)
B1 = 200000, B2 = 2000000 (P-1 stage 2)
B1 = 200000 (P-1 stage 1)
104
105
106
107
104
105
106
107
108
109
1010
1011
TF factor-bounds graph:
273
271
268
267
266
265
264
263
262
261
this exponent TF target: 65
TF double-checked to: 67
ECM T-Level=1.73 ~= -11-bit
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Last modified: 2024-03-13T02:15:48+00:00