Prime Numbers
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Numbers
Compare 11 vs 181
Compare 11 vs 181
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Property
11
181
Type
prime
prime
Unique factors
1
1
Total factors
1
1
Prime factorization
11
^{1}
181
^{1}
Prime factorization
11
181
Divisors count
2
2
Divisors
1
,
11
1
,
181
Number of properties
36
8
Additive primes
5th
Centered decagonal primes
1st
Centered square primes
6th
Chen primes
5th
33rd
Class 1+ primes
5th
Cousin primes
(2nd member)
2nd
Dihedral primes
3rd
5th
Good primes
2nd
Long primes
16th
Lucas primes
4th
Mills primes
2nd
Palindromic primes
5th
9th
Pierpont primes of the 2nd kind
5th
Primes
5th
42nd
Prime quadruplets
(1st member)
2nd
Prime quadruplets
(3rd member)
1st
Prime quintuplet 1s
(2nd member)
1st
Prime quintuplet 2s
(1st member)
2nd
Prime quintuplet 2s
(3rd member)
1st
Prime sextuplets
(2nd member)
1st
Prime triplets
(1st member)
3rd
Prime triplets
(2nd member)
2nd
Prime triplets
(3rd member)
1st
Pythagorean primes
19th
Safe primes
3rd
Sexy primes
(1st member)
3rd
Sexy primes
(2nd member)
1st
Sexy prime quadrupletss
(1st member)
2nd
Sexy prime quadrupletss
(2nd member)
1st
Sexy prime triplets
(1st member)
3rd
Sexy prime triplets
(2nd member)
1st
Solinas primes
4th
Sophie germain primes
4th
Super primes
3rd
Thabit primes
3rd
Twin primes
(1st member)
3rd
Twin primes
(2nd member)
13th
Ulam primes
3rd
Wagstaff primes
2nd
Wedderburn-etherington primes
3rd
Roman numberals
XI
CLXXXI
Base 2
1011
_{2}
10110101
_{2}
Base 3
102
_{3}
20201
_{3}
Base 4
23
_{4}
2311
_{4}
Base 5
21
_{5}
1211
_{5}
Base 6
15
_{6}
501
_{6}
Base 7
14
_{7}
346
_{7}
Base 8
13
_{8}
265
_{8}
Base 9
12
_{9}
221
_{9}
Base 10
11
_{10}
181
_{10}
Base 11
10
_{11}
155
_{11}
Base 12
b
_{12}
131
_{12}
Base 13
b
_{13}
10c
_{13}
Base 14
b
_{14}
cd
_{14}
Base 15
b
_{15}
c1
_{15}
Base 16
b
_{16}
b5
_{16}
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