@3days3nights linux&gt;
factor 77777777
77777777: 7 11 73 101 137
echo '77 * 101' | bc
7777
echo '73 * 137' | bc
10001
thus
77777777 = 7777 * 10001
check:
echo '7777 * 10001' | bc
77777777
oh,
10001 in binary is (16 + 1) = 17 
check:
echo "=2;10001" | bc
17
lulz 🤓