Prime Numbers
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Numbers
Compare 5 vs 191
Compare 5 vs 191
Compare
vs
Compare
Property
5
191
Type
prime
prime
Unique factors
1
1
Total factors
1
1
Prime factorization
5
^{1}
191
^{1}
Prime factorization
5
191
Divisors count
2
2
Divisors
1
,
5
1
,
191
Number of properties
36
16
Additive primes
3rd
24th
Bell primes
2nd
Centered square primes
1st
Chen primes
3rd
34th
Class 1+ primes
3rd
14th
Dihedral primes
2nd
Factorial primes
3rd
Fermat primes
2nd
Fibonacci primes
3rd
Good primes
1st
16th
Harmonic primes
1st
15th
Left-truncatable primes
3rd
Multiplicative primes
3rd
Palindromic primes
3rd
10th
Pierpont primes
3rd
Pierpont primes of the 2nd kind
3rd
14th
Primes
3rd
43rd
Prime quadruplets
(1st member)
1st
4th
Prime quintuplet 2s
(1st member)
1st
Prime triplets
(1st member)
1st
13th
Proth primes
2nd
Pythagorean primes
1st
Restricted left-truncatable primes
2nd
Right-truncatable primes
3rd
Safe primes
1st
Sexy primes
(1st member)
1st
25th
Sexy prime quadrupletss
(1st member)
1st
Sexy prime triplets
(1st member)
1st
Solinas primes
2nd
25th
Sophie germain primes
3rd
15th
Super primes
2nd
14th
Thabit primes
2nd
6th
Twin primes
(1st member)
2nd
14th
Twin primes
(2nd member)
1st
Two-sided primes
3rd
Wilson primes
1st
Roman numberals
V
CXCI
Base 2
101
_{2}
10111111
_{2}
Base 3
12
_{3}
21002
_{3}
Base 4
11
_{4}
2333
_{4}
Base 5
10
_{5}
1231
_{5}
Base 6
5
_{6}
515
_{6}
Base 7
5
_{7}
362
_{7}
Base 8
5
_{8}
277
_{8}
Base 9
5
_{9}
232
_{9}
Base 10
5
_{10}
191
_{10}
Base 11
5
_{11}
164
_{11}
Base 12
5
_{12}
13b
_{12}
Base 13
5
_{13}
119
_{13}
Base 14
5
_{14}
d9
_{14}
Base 15
5
_{15}
cb
_{15}
Base 16
5
_{16}
bf
_{16}
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