997
The largest prime number under 10,000,000 is 9,999,991
The largest prime under 20 is 19.
Prime numbers can't have whole number square roots, of course, but the largest prime number under 400 is 397.
because it has no other denominators beside 1 and itself
Millions
97 is the largest prime number under 100
The largest prime number under 200 is 199.
The largest prime number under 10,000,000 is 9,999,991
the largest prime number under 100 is 97
The largest prime under 20 is 19.
The prime factors of 100 are 2 and 5; the largest of these is 5. The largest prime number under 100 is 97.
743
293
19
Prime numbers can't have whole number square roots, of course, but the largest prime number under 400 is 397.
because it has no other denominators beside 1 and itself
Well, honey, let me break it down for you. When you multiply a 4-digit number (ranging from 1000 to 9999) by a 1-digit number (ranging from 0 to 9), the result can be a 3-digit number (ranging from 0 to 8991). So no, the product of a 4-digit number and a 1-digit number is not always a 5-digit number. Math doesn't discriminate, darling.