Looks for string with lowest sha512 hash

#include <stdlib.h>
#include <stdio.h>
#include <stdint.h>
#include <string.h>
#include <pthread.h>
#include <openssl/sha.h>

typedef struct {
    int threadid;
    int iterations;
    uint64_t dataMin;
    unsigned char outputMin[64];
} Setup;

void* runSearch(void* context)
{
    Setup* setup = context;
    uint64_t data = setup->threadid;
    unsigned char output[64];
    setup->dataMin = data;
    unsigned char* min = setup->outputMin;
    min[0] = 0xff;

    data &= 0x1f1f1f1f1f1f1f1fll;
    data |= 0x4040404040404040ll;
    for(int x=0 ; x<setup->iterations ; x++)
    {
        SHA512((unsigned char*)&data, 8, output);
        for(int i=0 ; i<64 ; i++)
        {
            if(output[i] < min[i])
            {
                memcpy(min, output, 64);
                setup->dataMin = data;
                break;
            }
            else if(output[i] > min[i])
            {
                break;
            }
        }
        data |= 0xe0e0e0e0e0e0e0e0ll;
        data += 8;
        data &= 0x1f1f1f1f1f1f1f1fll;
        data |= 0x4040404040404040ll;
    }

    return NULL;
}

Setup setups[8];

int main(int argc, char** argv)
{
    int iter = 1000000;
    int threadCount = 1;
    pthread_t threads[8];
    uint64_t dataMin;
    unsigned char outputMin[64] = {0xff};

    if(argc > 1) iter = atoi(argv[1]);
    if(argc > 2) threadCount = atoi(argv[2]);

    for(int i=0 ; i<threadCount ; i++)
    {
        setups[i] = (Setup){.threadid=i, .iterations=iter};
        pthread_create(&threads[i], NULL, runSearch, &setups[i]);
    }

    for(int i=0 ; i<threadCount ; i++)
    {
        pthread_join(threads[i], NULL);
    }


    for(int t=0 ; t<threadCount ; t++)
    {
        unsigned char* min = setups[t].outputMin;
        for(int i=0 ; i<64 ; i++)
        {
            if(min[i] < outputMin[i])
            {
                memcpy(&outputMin, min, 64);
                dataMin = setups[t].dataMin;
                break;
            }
            else if(min[i] > outputMin[i])
            {
                break;
            }
        }
    }

    for(int i=0 ; i<8 ; i++)
        printf("%c", ((char*)&dataMin)[i]);
    puts("");

    for(int i=0 ; i<64 ; i++)
        printf("%.2x", outputMin[i]);
    puts("");
}