private static EInteger FuzzInteger(
EInteger ei,
int fuzzes,
RandomGenerator r) {
byte[] bytes = ei.ToBytes(true);
int bits = ei.GetUnsignedBitLength();
for (var i = 0; i < fuzzes; ++i) {
int bit = r.UniformInt(bits);
bytes[bit / 8] ^= (byte)(1 << (bit & 0x07));
}
return EInteger.FromBytes(bytes, true);
}
