As an editorial comment, there are only 10 types of people, those who understand binary and those who don't.
For those who "don't", 10 (binary) = 2 (decimal)
100001
100001
100001
100001
100001
It is 100001.
100001
100001
One hundred thousand, one.
33 in decimal is 100001 in binary.
One hundred thousand and one
100001 is a big number and it is not easy to tell if the number is a prime number or not.But we can always start with numbers like 2, 3, 5, 7, 11, 13 etc, which are also prime numbers.Dividing 100001 each time with prime numbers can be tedious.So we have to check by using divisibility rules.Check with the first few prime numbers...Let's check with 2:100001 is an odd number so it is not divisible by 2.Let us check if the number is divisible by 3:Sum of digits = 1+0+0+0+0+1 = 2[If the sum of digits is not a multiple of 3, then the number is not divisible by 3.]Sum of digits is 2 and 2 is not a multiple of 3(or 2 is not divisible by 3).So, 100001 is not divisible by 3.Let's check with 11 after checking with 5 and 7:Sum of digits at odd places = 1+0+0 = 1Sum of digits at even places = 0+0+1 = 1Difference = 1-1 = 0[If the difference is zero or a multiple of 11 then the number is divisible by 11.]So 100001 is divisible by 11.Since 100001 is divisible by 11, it means 100001 has more than two factors.So, 100001 is not a prime number.