- **Math**
(*https://www.mersenneforum.org/forumdisplay.php?f=8*)

- - **Number of zero's in largest prime...**
(*https://www.mersenneforum.org/showthread.php?t=5657*)

The GMP program for 2^107-1 recorded a small negative time... but in fact took about 45 32-bit Athlon GHz-hours:
[CODE]Exponent Total number of zeroes 2 1 3 1 5 2 7 5 13 8 17 13 19 15 31 28 61 96 89 140 107 185 [/CODE] I am not going to attempt Lucas' 2^127-1 :wink: |

[QUOTE=paulunderwood]The GMP program for 2^107-1 recorded a small negative time... but in fact took about 45 32-bit Athlon GHz-hours:[/QUOTE]
Oh, yes there is a problem in timing routine above about 1800 sec ( because I've used double variable ). But the program is good. |

[QUOTE=casevh]
89 * ln(2) * [ln(ln(sqrt(2^89-1))) - ln(ln(3))] [/QUOTE] I don't know what's going on. I evaluated that on Mathematica and I got 206, not 326... |

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