is 2 1600607 - 1
has 481831 decimal digits
takes 0.071 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-LDF27A16197196027double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual26718.564268.6567 %500000150000000.08354.9874 %18.647770.2199 %
Target2610.191965.5738 %65003000000.00151.0564 %0.193465.9375 %
Difference+6+18.3722+3.0829 %+493500+14700000+0.0821+3.9309%+18.4543+4.2825 %

Known prime factors (1 factor, 63.9 bits, 0.00399239% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
1600607172417812832252908012063.9035386013332200
23 × 32 × 52 × 2992229629
2008-03-292529922296290.997110.55919.720

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2016-03-17alpertronManual testing5000001500000012---8.737%


Trial Factoring results:
5758596061626364656667
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
1998-10-29ANONYMOUSv4_computers212570.012


ECM factoring results:
Total ECM effort:31.349 GHz-days
Estimated T-Level:25.717
DigitsB1CompleteFacMiss
201100014.6150.000%
25500001.67118.807%
302500000.14386.643%
3510000000.01099.006%


ECM Summary

B1B2factorcurvesGHz-days
10.042
50000500000025014.02
250000400000005017.29


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-11-07ANONYMOUSv4_computersDF27A161971960270.071


PRP results:
dateuseridcompidcofactorsres64
2017-10-02Oliver KruseGTX-2
17241781283225290801
8E944F17A921CE1A
2017-11-10kkmrkkblmbrbkc4.xlarge
17241781283225290801
8E944F17A921CE1A


CERT results:
No CERT results for M1600607


P-1 factor-bounds graph:
B1 = 500000, B2 = 15000000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
100
101
102
103
104
105
106
100
101
102
103
104
105
106
107
108
109
1010
TF factor-bounds graph:
257
this exponent TF target: 61
TF double-checked to: 67
ECM T-Level=25.72 ~= 69-bit
250
260
270
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Last modified: 2024-03-03T02:29:32+00:00