# Security Implications / factoring

**John Kane
**
jkane89@softhome.net

*Sun Dec 16 13:46:01 2001*

Ingo Kloecker writes to Ryan Malayter :
>For n=512 I get 107.54... and for n=1024 I get 132.26...
>There must be something wrong with (RM's) formula
There seem to be several garbled versions of the formula
in circulation, but I gather the GNFS is supposed to be
e^( 1.9223 * (ln N)^(1/3) * (ln ln N)^(2/3) )
where N is the actual number being factored, and not just
the 512/1024 size in bits.
The SNFS, with an exponent of 1.5262, is apparently not
able to factor RSA/DH keys.
--
John Kane
New Hampshire (northeastern USA)