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What is the greatest known prime number till date? How to say whether a number is prime or not?
What is the greatest known prime number till date? How to say whether a number is prime or not?
asked by blogdigz 3 months ago
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Sasha S says
(2^43112609)-1 is a prime number with 12,978,189 digits.
Prime numbers are numbers that can only be divided by themself and 1 to produce a whole number.
soumabha says
(2^43112609)-1 is a prime number with 12,978,189 digits.
It is very difficult to say whether a number is prime or not.But the easiest method is
Find the sqrt of number.If the sqrt is a fraction,take oly the integralpart,check if there is any factor of the given number below sqrt. of the number.If it exits,the number is not prrime otherwise not.
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