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241 (number) - Wikipedia

From Wikipedia, the free encyclopedia

For uses of the phrase "two for one", see

.

Natural number

241 (two hundred [and] forty-one) is the natural number between 240 and 242. It is also a prime number.

241 is the larger of the twin primes (239, 241). Twin primes are pairs of primes separated by 2.
241 is a regular prime^[1] and a lucky prime.^[2] Since 241 = 15 × 2⁴ + 1, it is a Proth prime. ^[3]
241 is a repdigit in base 15 (111).
241 is the only known Lucas–Wieferich prime to (U, V) = (3, −1).

v
t
e

Integers −1 0s

0
1
2
3
4
5
6
7
8
9

10
11
12
13
14
15
16
17
18
19

20
21
22
23
24
25
26
27
28
29

30
31
32
33
34
35
36
37
38
39

40
41
42
43
44
45
46
47
48
49

50
51
52
53
54
55
56
57
58
59

60
61
62
63
64
65
66
67
68
69

70
71
72
73
74
75
76
77
78
79

80
81
82
83
84
85
86
87
88
89

90
91
92
93
94
95
96
97
98
99

1000
- 1001
- 1023
- 1024
- 1089
- 1093
- 1105
- 1234
- 1289
- 1458
- 1510
- 1728
- 1729
- 1980
- 1987
2000
- 2016
- 2520
3000
- 3511
4000
- 4104
5000
- 5040
6000
- 6174
7000
- 7744
- 7825
8000
- 8128
- 8192
9000
- 9855
- 9999

10,000
- 16,807
20,000
30,000
40,000
50,000
60,000
- 64,079
- 65,535
- 65,536
- 65,537
70,000
80,000
90,000

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