The file contains prime numbers and generators for use by in  the
     Diffie-Hellman  Group  Exchange  key exchange method.  New moduli
     may be generated with using a two-step process.  An initial pass,
     using  calculates numbers that are likely to be useful.  A second
     pass, using provides a high degree of assurance that the  numbers
     are  prime  and  are safe for use in Diffie-Hellman operations by
     This format is used as the  output  from  each  pass.   The  file
     consists   of   newline-separated   records,   one  per  modulus,
     containing seven space-separated fields.   These  fields  are  as
     follows:  The  time  that  the  modulus  was  last  processed  as
     YYYYMMDDHHMMSS.  Decimal number specifying the internal structure
     of  the prime modulus.  Supported types are: Unknown, not tested.
     "Safe" prime; (p-1)/2 is also prime.   Sophie  Germain;  2p+1  is
     also  prime.   Moduli candidates initially produced by are Sophie
     Germain primes (type 4).  Further primality testing with produces
     safe  prime moduli (type 2) that are ready for use in Other types
     are not used by OpenSSH.  Decimal number indicating the  type  of
     primality tests that the number has been subjected to represented
     as a bitmask of the  following  values:  Not  tested.   Composite
     number  en  not  prime.   Sieve  of  Eratosthenes.   Probabilistic
     Miller-Rabin primality tests.  The  moduli  candidate  generation
     uses the Sieve of Eratosthenes (flag 0x02).  Subsequent primality
     tests  are  Miller-Rabin  tests  (flag  0x04).   Decimal   number
     indicating   the  number  of  primality  trials  that  have  been
     performed on the modulus.  Decimal number indicating the size  of
     the  prime  in bits.  The recommended generator for use with this
     modulus (hexadecimal).  The modulus itself in hexadecimal.   When
     performing  Diffie-Hellman  Group  Exchange,  first estimates the
     size of the modulus required  to  produce  enough  Diffie-Hellman
     output  to  sufficiently key the selected symmetric cipher.  then
     randomly  selects  a  modulus  from  that  best  meets  the  size
     requirement.