# clear the screen
clear

# loop for a powers of 2 progression 32-4194304 (inclusive)
for((qty=32; qty<=4194304; qty*=2)); do

    # display the quantity lead-in information
    printf "[%7s] %7sth prime: " "${qty}" "${qty}"
    
    # obtain the last/largest prime in the specified quantity
    value=$(./primebrksrtoptodd ${qty} 1 2>/dev/null | tr ' ' '\n' | tail -2 | head -1)

    # display it, along with calculating its approximate multiplier
    printf "%8s (x%s)\n" "${value}" $(echo "(${value}/${qty})+1" | bc -q)
done