dario2994

#!/usr/bin/env python3

# This program prints all hcn (highly composite numbers) <= MAXN (=10**18)
#
# The value of MAXN can be changed arbitrarily. When MAXN = 10**100, the
# program needs less than one second to generate the list of hcn.
from math import log

MAXN = 10**18

atoponce

Cryptographic Best Practices

Putting cryptographic primitives together is a lot like putting a jigsaw puzzle together, where all the pieces are cut exactly the same way, but there is only one correct solution. Thankfully, there are some projects out there that are working hard to make sure developers are getting it right.

The following advice comes from years of research from leading security researchers, developers, and cryptographers. This Gist was [forked from Thomas Ptacek's Gist][1] to be more readable. Additions have been added from

vlucas

import { createCipheriv, createDecipheriv, randomBytes } from "crypto";

const ENCRYPTION_KEY: string = process.env.ENCRYPTION_KEY || ""; // Must be 256 bits (32 characters)
const IV_LENGTH: number = 16; // For AES, this is always 16

/**
 * Will generate valid encryption keys for use
 * Not used in the code below, but generate one and store it in ENV for your own purposes
 */
export function keyGen() {

primaryobjects

recaman <- function(n, s=c()) {
  a <- 0

  if (n > 0) {
    val <- recaman(n - 1, s)
    
    a <- val$a
    s <- c(val$s, a)

    an1 <- a - n

markcode

Scaling Event Logs and Hash Partitioning Function

Setup

A COLLECTION is created in a CLUSTER (of BROKERS) with a defined and fixed number of potential PARTITIONS. For example: 12 data log files (AKA PARTITIONS), each with 256 VIRTUAL-PARTITIONS within; totalling 3072 potential PARTITIONS.

ERA is an incrementing and synchronous COLLECTION of the PARTITIONS. The starting ERA is 1, and the next will be 2; and so on.

Each BROKER is a member of a CLUSTER; whenever a BROKER joins or leaves a CLUSTER a new ERA is declared across all BROKERS within the CLUSTER. The old ERA’s PARTITIONS are closed from writes and new PARTITIONS are created for writing.