def solve(m, m2):
tStart = time.time()
ways = [[0 for _ in range(m2+2)] for _ in range(m2+2)]
maxPrime = 10000
pr = set(help.primesUpTo(maxPrime))
n = 1
while getWays(n, n, pr, ways) < m and n < m2:
n += 1
if n >= maxPrime:
maxPrime *= 10
pr = set(help.primesUpTo(maxPrime))
print(n)
print("Run Time = " + str(time.time() - tStart))
def solve(max):
tStart = time.time()
max2 = math.ceil(math.sqrt(max))
max3 = math.ceil(math.pow(max,1/3))
max4 = math.ceil(math.pow(max,1/4))
pr2 = help.primesUpTo(max2)
pr3 = help.primesUpTo(max3)
pr4 = help.primesUpTo(max4)
numbers = []
for p2 in pr2:
for p3 in pr3:
for p4 in pr4:
prod = p2**2 + p3**3 + p4**4
if prod < max:
numbers.append(prod)
print(len(set(numbers)))
print("Run Time = " + str(time.time() - tStart))
def solve(max, maxPrime):
tStart = time.time()
pr = help.primesUpTo(maxPrime)
for i in range(0, len(pr)):
n = i + 1
if f(pr[i]) > max:
print(n)
print("Run Time = " + str(time.time() - tStart))
return
def solve(n,m):
tStart = time.time()
pr = help.primesUpTo(m+1)
l = []
for i in range(1,m+1):
l.append([i,rad(i,pr)])
print(sorted(l,key=lambda h: h[1])[n-1])
print("Run Time = " + str(time.time() - tStart))
def solve(max,max2):
tStart = time.time()
pri = help.primesUpTo(max)
pr = set(help.primesUpTo(max2))
min = 0
for p1 in pri:
for p2 in pri:
if p2 > p1 and hasP(p1,p2,pr):
for p3 in pri:
if p3 > p2 and hasP(p1,p3,pr) and hasP(p2,p3,pr):
for p4 in pri:
if p4 > p3 and hasP(p1,p4,pr) and hasP(p2,p4,pr) and hasP(p3,p4,pr):
for p5 in pri:
if p5 > p4 and hasP(p1,p5,pr) and hasP(p2,p5,pr) and hasP(p3,p5,pr) and hasP(p4,p5,pr):
s = p1+p2+p3+p4+p5
if s < min or min == 0:
min = s
print(min)
print("Run Time = " + str(time.time() - tStart))
def solve(max):
tStart = time.time()
pr = help.primesUpTo(max)
lastCount = 2
n = 0
for i in range(3, max):
count = countDiv(i, pr)
if count == lastCount:
n += 1
lastCount = count
print(n)
print("Run Time = " + str(time.time() - tStart))
def solve(max):
tStart = time.time()
primes = help.primesUpTo(math.ceil(math.sqrt(max)))
mintotient = 1
minratio = 1000
for i in range(2, max):
totient = help.totient(i, primes)
if isPerm(i, totient) and minratio > i/totient:
mintotient = totient
minratio = i/totient
print(i, mintotient, minratio)
print("Run Time = " + str(time.time() - tStart))
def solve(m):
last = [1,1]
all = set([1])
for j in range(1, m):
current = [1]
for i in range(1,len(last)):
n = last[i]+last[i-1]
all.add(n)
current.append(n)
current.append(1)
last = current
pr = help.primesUpTo(50)
print(sum(list(filter(lambda x: isSquareFree(x, pr), all))))
def solve(start, max, plus, min):
tStart = time.time()
d = start
minres = 1
primes = []
primes = help.primesUpTo(math.ceil(math.sqrt(max)))
while d <= max:
d += plus
res = resilience(d, primes)
if minres > res:
minres = res
print(minres, d)
if minres < min:
print(d)
break
print("Run Time = " + str(time.time() - tStart))
def solve(max):
tStart = time.time()
pr = help.primesUpTo(int(max/2))
count = 0
for i in range(0, len(pr)):
for j in range(i, len(pr)):
if pr[i]*pr[j] < max:
count += 1
else:
break
print(count)
print("Run Time = " + str(time.time() - tStart))
def solve(max):
tStart = time.time()
pr = help.primesUpTo(math.ceil(math.sqrt(max)))
print(sum(list(map(lambda n: help.totient(n, pr), range(2,max+1)))))
print("Run Time = " + str(time.time() - tStart))
#Totient Chains
#Problem 214
import time
import help
maxprime = 40000000
pr = help.primesUpTo(maxprime)
solved = dict()
solved[1] = 1
def getTot(p):
if p not in solved:
solved[p] = 1 + getTot(help.totient(p, pr))
return solved[p]
tStart = time.time()
mysum = 0
for p in pr:
if getTot(p) == 25:
print(p)
mysum += p
print(mysum)
print("Run Time = " + str(time.time() - tStart))
# Prime pair connection
#Problem 134
import time
import help
def getFactors(p1, p2, d):
for i in range(0, 10):
if ((p1 * i + d) % 10) == (p2 % 10):
if p2 // 10 == 0:
return i
else:
return i + 10 * getFactors(p1, p2 // 10, (p1 * i + d ) // 10)
def getS(p1, p2):
F = getFactors(p2, p1, 0)
return F * p2
maxnumber = 1000000+4
pr = help.primesUpTo(maxnumber)
tStart = time.time()
mysum = 0
for i in range(2,len(pr)-1):
mysum += getS(pr[i], pr[i+1])
print(mysum)
print("Run Time = " + str(time.time() - tStart))
def solve(max):
pr = help.primesUpTo(max)
print(sum(list(map(S, pr))))
#Pandigital prime sets
#Problem 118
import time
import help
maxprime = 98765432
pr = set(help.primesUpTo(maxprime))
def getNumbers(S):
for n in sorted(map(int, list(S))):
yield n
for k in getNumbers(strDiff(S, str(n))):
yield k*10+n
def strDiff(S, T):
s = ''
for token in S:
if not token in T:
s += token
return s
def isPrime(n):
if n < maxprime:
return n in pr
else:
return help.isPrime(n)
def run():
tStart = time.time()
S1 = '123456789'
# Problem 127
import unittest
from fractions import gcd
import help
g_upperBound = 120000
g_primes = help.primesUpTo(g_upperBound)
g_primesSet = set(g_primes)
g_solvedRad = []
for i in range(g_upperBound):
g_solvedRad.append([i,1])
for i in range(2, g_upperBound):
if g_solvedRad[i][1] == 1:
g_solvedRad[i][1] = i
for j in range(2*i, g_upperBound, i):
g_solvedRad[j][1] *= i;
g_sortedRad = sorted(g_solvedRad,key=lambda h: h[1])
def isABCHit(a, b, c):
return gcd(a,b) == 1 and a < b and a + b == c and rad(a)*rad(b)*rad(c) < c
def isABCHitSimple(a, b, c):
return rad(a)*rad(b)*rad(c) < c and gcd(a,b) == 1
#Problem 131
import time
import help
tStart = time.time()
m = 6
pr = set(help.primesUpTo(10**m))
c = 0
d = 0
n = 1
while d < 10**m:
d = (n+1)**3-n**3
if d in pr:
print(d)
c += 1
n += 1
print(c)
print("Run Time = " + str(time.time() - tStart))
#Prime connection #Problem 425 import time import help from math import log from heapq import heappush, heappop m = 6 connectedDict = dict() sortedPr = help.primesUpTo(10**m) pr = set(sortedPr) def getConnected(p): if p not in connectedDict: connected = [] for i in range(10): connected.append(p + i*10**len(str(p))) for i in range(len(str(p))): for r in replacements(p, i): if not r == 0 and int(log(r,10)) == int(log(p,10)): connected.append(r) connected = list(filter(lambda x: x in pr and not x == p, connected)) connectedDict[p] = sorted(connected) return connectedDict[p] def replacements(p, i): for j in range(10): yield replace(p, i, j) def discardLeft(p):
def solve(m, max):
pr = help.primesUpTo(m)
print(countHamming(pr, max))
def blah(l):
pr = help.primesUpTo(100)
if count(l) >= 4000000:
print(calcNumber(l, pr))
def getPrimeSumOfBinom(n, m):
mysum = 0
pr = help.primesUpTo(n)
for p in pr:
mysum += p * countExpInBinom(n, m, p)
return mysum
# Prime pair connection
#Problem 134
import time
import help
def getRep(n):
return ( 10**n -1 ) // 9
tStart = time.time()
m = 5 #5
k = 100
primes = help.primesUpTo(10**m)
mySum = 0
for p in primes:
if not 1 == pow(10,10**k, 9 * p):
#print(p)
mySum += p
print(mySum)
print("Run Time = " + str(time.time() - tStart))
