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- sequences and series - Is . . . - Mathematics Stack Exchange
You'll need to complete a few actions and gain 15 reputation points before being able to upvote Upvoting indicates when questions and answers are useful What's reputation and how do I get it? Instead, you can save this post to reference later
- Java conversion from binary to octal - Stack Overflow
So I have this code for converting a binary to octal I want to convert up to 64 bits of binary but it doesn't work What should I do? String result=""; int i; long a[]=new long[100]; String i
- When is the number $11111\\cdots1$ a prime number?
After adding 1 1, the n n s for which the sum above is known to be prime or probably prime are given in the OEIS sequence A004023 (The +1 + 1 is because the OEIS lists numbers n n such that (10n − 1) 9 (10 n 1) 9 is prime, but the sum in the question is instead equal to (10n+1 − 1) 9 (10 n + 1 1) 9 ) Also, see the Wikipedia article and the Prime Pages entry These primes are called
- The sequence 1,11,111,. . . and the prime factorization of its elements
I have been recently investigating the sequence 1,11,111, I found, contrary to my initial preconception, that the elements of the sequence can have a very interesting multiplicative structure T
- why is 00000000 - 00000001 = 11111111 in C unsigned char data type?
I observed that, when a unsigned char variable stores the value 0 (00000000 2) and it gets decremented by 1 (00000001 2), the variable value turns into 255 (11111111 2), which is the highest value that a unsigned char variable can hold My question is: why 00000000 2 - 00000001 2 turns into 11111111 2? (I want to see the arithmetic behind it) The C code in which i observed it was this one: #
- How can 1111 1111 be the two-s complement representation of -1?
My book says that to get the two's-complement representation, to just flip the bits and add 1 Correct me if I am wrong but the binary representation of -1 would be: 1000 0001 The MSB 1 denotes th
- Error 0x80070005: Failed to launch clean room process while . . .
My Visual Studio 2017 Professional stopped being able to load some projects in a solution, and on investigation, VS tells me that I have to install the ASP NET and Web development feature I'm sure
- Can you solve my problem and simplify my code? I could not find out . . .
Here's an example that uses uint64_t to represent larger numbers It shows the output you want for 1 up to 20 digits (longer causes an overflow) The trick is to generate the numbers 1, 11, 111, and so on from the previous one by multiplying by 10 and adding 1 For example, 11111 = 1111 * 10 + 1 #include <inttypes h> #include <stdio h> void sum(int n) { uint64_t t = 0; uint64_t x = 1; for
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