This is composite number
102400...002401=102400...00*10^4+2401=1024*10^(2012+4)+2401=4*256*10^2016+2401=4*(4*10^504)^4+7^4 4a^4+b^4 is a composite number equal to (2a^2+2ab+b^2)*(2a^2-2ab+b^2)
Is this number prime or composite - 1111.....1 (77 1's)
Note: Provide the explanation...
Find a 10 digit number where the first digit is how many 0's in the number. The second digit is the number of 1's in the number. The third digit gives the number of 2's The fourth digit gives the number of 3's in the number so on until the 10th digit which gives the number of 9's in the number.
Prime number 31 can be expressed in the form n^5 -1, where n=2. Are there any other primes that can be expressed this way?
The digits in the decimal 0.07007000700007… follow a pattern where there are increasing 0s before a 7. There is one 0 and a 7, then two 0s and a 7, three 0s and a 7, and so on.
What is the 1000th digit after its decimal point?
