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RUN :

  1. make
  2. ./output

OR RUN :

  1. gcc g_power_x.c functions.c -o output
  2. ./output

FOR Recompilation RUN :

  1. make clean

p = p256 = 2^256-2^224+2^192+2^96-1 (NIST suggested P-256) = 0xffffffff00000001000000000000000000000000ffffffffffffffffffffffff (in hex)

This will print an array of four 64-bit long integers. This is the g^x (mod p). The actual number is : g^x[0] + g^x[1](2^64) + g^x[2](2^64)^2 + g^x[3]*(2^64)^3 (in decimal system)