is 2 1845901 - 1
has 555672 decimal digits
takes 0.100 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
Actual26716.097268.6567 %4000004316318161.87968.1521 %17.976971.2119 %
Target2610.166465.5738 %90007500000.00391.6302 %0.170366.1350 %
Difference+6+15.9308+3.0829 %+391000+430881816+1.8757+6.5219%+17.8066+5.0769 %

Known prime factors (3 factors, 163.1 bits, 0.00883642% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
184590132441746993031341.561878751
32 × 251 × 389
-2513891.914e-72.034e-54.018e-5
1845901299894122076342391754.7358123245019
59879 × 135661
2014-12-11598791356610.00150.00500.0096
18459011298346072081714224892166.81535168356051644
22 × 3 × 89 × 683 × 48212551
2020-10-016834821255112.6690.20670.3859

4 Composite Factors:
P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2022-04-12Lisander ViaeneDesktop500100500100
skipped known factor: 3244174699303
skipped known factor: 29989412207634239
--0.0393.938%
2022-08-27USAFSS6917th_Scty_Sq400000431631816
skipped known factor: 3244174699303
skipped known factor: 29989412207634239
skipped known factor: 129834607208171422489
--2.27813.428%


Trial Factoring results:
5758596061626364656667
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2014-12-11TJAOIManual testing254255*
54.735
17
0.001
2022-04-03Lisander ViaeneManual testing21261
41.561
54.735
13
17
2022-04-04LordJuliusManual testing261266
2020-10-01TJAOIManual testing266267*
66.815
21
6.601


ECM factoring results:
Total ECM effort:39.097 GHz-days
Estimated T-Level:25.704
DigitsB1CompleteFacMiss
201100015.1260.000%
25500001.68218.601%
302500000.14186.871%
3510000000.01099.049%


ECM Summary

B1B2factorcurvesGHz-days
500005000000292.005
50000660000022017.15
50000675000070.551
84000840000010.116
250000400000004519.28


Lucas-Lehmer results:
No L-L results for M1845901


PRP results:
dateuseridcompidcofactorsres64
2017-10-04Oliver KruseGTX-3
3244174699303
29989412207634239
785F4DB9F32AEBD8
2017-11-06kkmrkkblmbrbkold
3244174699303
29989412207634239
785F4DB9F32AEBD8
2020-10-01M Millercruncher
3244174699303
29989412207634239
129834607208171422489
C6A7B80975750B08


CERT results:
dateuseridcompid
2020-10-01yatyatlingrdp-133-168


P-1 factor-bounds graph:
B1 = 400000, B2 = 431631816 (P-1 stage 2)
B1 = 500100 (P-1 stage 1)
B1 = 400000 (P-1 stage 1)
101
102
103
104
105
106
101
102
103
104
105
106
107
108
109
TF factor-bounds graph:
266
261
this exponent TF target: 61
TF double-checked to: 67
ECM T-Level=25.7 ~= 69-bit
250
260
270
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Last modified: 2024-03-13T02:15:48+00:00