[QUOTE=fivemack;450476]releasing 218420 (2^3 · 3^3 · 5^2 · C157)

I can't imagine anyone's going to want to pick that one up any time soon[/QUOTE]

Doesn't it have potential to change power of 2 next iteration?

[QUOTE=henryzz;450622]Doesn't it have potential to change power of 2 next iteration?[/QUOTE]

No. 3^3 is sufficient to keep 2^3. If it was 3^2 ...

[QUOTE=henryzz;450622]Doesn't it have potential to change power of 2 next iteration?[/QUOTE]

[$]\tau(3^3) = 3[/$] (versus normally [$]\tau(3) = 2[/$]) so the class is effectively 0, even without the contribution of the 5 -- unbreakable.

Take 666930

releasing 684816

reserving 459828

Just had to add more posts yet again. Now taking over a minute to update all the posts.

reserving 700700

releasing 459828

drop 281190 (C142, 4000@3e6 done)

(this is a bit sad, factors went

1111 2^2 * 3^3
1112 2^2 * 3^2
1113 2^2 * 11
1114 2^2 * P66
1115 2^2 * 3^4
1116 2^2 * 3^2

so it lost a persistent power of three for precisely two iterations)

reserving 733866

releasing 700700