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All integers are either even or odd. A square has even multiplicity for all prime factors (it is of the form a 2 for some a). The first: 1, 4, 9, 16, 25, 36, 49, 64, 81, 100, 121, 144 (sequence A000290 in the OEIS). A cube has all multiplicities divisible by 3 (it is of the form a 3 for some a).
This is a list of articles ... write the prime factorization of n in base 10 and concatenate the factors; iterate until a ... 17, 37, 47, 67, 97, 107, 127, 137 ...
The same prime factor may occur more than once; this example has two copies of the prime factor When a prime occurs multiple times, exponentiation can be used to group together multiple copies of the same prime number: for example, in the second way of writing the product above, 5 2 {\displaystyle 5^{2}} denotes the square or second power of 5 ...
Here's the maximum possible Social Security benefit at ages 62, 66, 67, and 70. ... That's somewhat offset by factors favoring younger retirees. Still, all things being equal, someone turning 62 ...
16, 22, 34, 36, 46, 56, 64, 66, 70, 76, 78, 86, 88, ... The length of an interval of consecutive integers with property that every element has a factor in common with one of the endpoints. A059756
Ages 62, 67, and 70 are key milestones in Social Security. Age 62 is the earliest you can claim benefits, 67 is most people's full retirement age, and 70 is when monthly benefits stop increasing ...
Although every age within the traditional collection range of 62 through 70 has its own unique advantages and drawbacks, three claiming ages are likely to be especially popular moving forward: 62 ...
69 is a semiprime because it is a natural number that is the product of exactly two prime numbers (3 and 23), and an interprime between the numbers of 67 and 71. [1] [2] 69 is not divisible by any square number other than 1, making it a square-free integer.