Technical Information
| HTTP Status Code | 200 |
| HTTP Version | HTTP/1.1 |
| HTTPS | ✔ Available |
| IP Address | 209.147.127.187 |
| Server Software | Microsoft-IIS/10.0 |
| Compression | gzip |
|
🔒 🟡 Mixed Content (1 HTTP resources) | The page is served over HTTPS but loads 1 resource(s) over HTTP. This may be blocked in modern browsers. |
|
ℹ 🔵 Missing Content Security Policy | CSP is not configured. It helps prevent XSS attacks and content injection. |
|
ℹ 🔵 Missing X-Frame-Options | The site can be embedded in iframes by third parties (clickjacking risk). |
HTTP Status Code 200
HTTP Version HTTP/1.1
HTTPS ✔ Available
IP Address 209.147.127.187
Server Software Microsoft-IIS/10.0
Compression gzip
🔒 🟡 Mixed Content (1 HTTP resources) The page is served over HTTPS but loads 1 resource(s) over HTTP. This may be blocked in modern browsers.
ℹ 🔵 Missing Content Security Policy CSP is not configured. It helps prevent XSS attacks and content injection.
ℹ 🔵 Missing X-Frame-Options The site can be embedded in iframes by third parties (clickjacking risk).
Redirect Chain
| # | URL | HTTP Status Code | Status |
| 1 | https://mersenne.org:443 | 301 | HTTP/2 301 |
| 2 | https://www.mersenne.org/ | 200 | HTTP/2 200 |
#1 URL https://mersenne.org:443
HTTP Status Code 301
Status HTTP/2 301
#2 URL https://www.mersenne.org/
HTTP Status Code 200
Status HTTP/2 200
Performance
| DNS Lookup | 22.9 ms |
| TCP Connect | 163.6 ms |
| TLS Handshake | 142 ms |
| Time To First Byte (TTFB) | 460.4 ms |
| Content Download | 0.2 ms |
| Total Response Time | 460.7 ms |
DNS Lookup 22.9 ms
TCP Connect 163.6 ms
TLS Handshake 142 ms
Time To First Byte (TTFB) 460.4 ms
Content Download 0.2 ms
Total Response Time 460.7 ms
Security
| HTTPS | ✔ Enabled |
| HSTS | ✔ max-age=31536000 |
| CSP | ⚠ Not configured |
| X-Frame-Options | ⚠ Not configured |
| X-Content-Type-Options | ⚠ Not configured |
| HTTP/2 | ⚠ HTTP/1.1 |
HTTPS ✔ Enabled
HSTS ✔ max-age=31536000
CSP ⚠ Not configured
X-Frame-Options ⚠ Not configured
X-Content-Type-Options ⚠ Not configured
HTTP/2 ⚠ HTTP/1.1
SEO Quick Check
| Title | Great Internet Mersenne Prime Search - PrimeNet |
| Meta Description | Great Internet Mersenne Prime Search - Finding world record primes since 1996. GIMPS is an organized search for Mersenne prime numbers using provided free software. |
| Canonical | https://www.mersenne.org/ |
Title Great Internet Mersenne Prime Search - PrimeNet
Meta Description Great Internet Mersenne Prime Search - Finding world record primes since 1996. GIMPS is an organized search for Mersenne prime numbers using provided free software.
Canonical https://www.mersenne.org/
Detected Technologies
| Technology | jQuery Google Analytics Google Tag Manager PHP |
Technology jQuery Google Analytics Google Tag Manager PHP
HTTP Headers
| Cache-control
| no-store, no-cache, must-revalidate |
| Pragma
| no-cache |
| Content-type
| text/html; charset=utf-8 |
| Content-encoding
| gzip |
| Expires
| Thu, 19 Nov 1981 08:52:00 GMT |
| Vary
| Accept-Encoding |
| Server
| Microsoft-IIS/10.0 |
| X-powered-by
| PHP/7.4.33 |
| Set-cookie
| GIMPSWWW=d7827aheor157fft878p6bjndv; expires=Sat, 19-Sep-2026 05:12:58 GMT; Max-Age=2592000; path=/; domain=mersenne.org; SameSite=Lax |
| Alt-svc
| h3=":443"; ma=86400; persist=1 |
| Strict-transport-security
| max-age=31536000 |
| Date
| Thu, 20 Aug 2026 05:12:58 GMT |
| Content-length
| 9132 |
Meta Tags
| Verify-v1 | WYSF3+h1L9Cx5XU6jNlVphqif221lxLkO9P+N3pnwkI= |
| Google-translate-customization | 281dbdc4dad024d8-9dfd1bf8d0732521-g51f75475d115313f-10 |
| Viewport | width=1000 |
| Rating | safe for kids |
| Description | Great Internet Mersenne Prime Search - Finding world record primes since 1996. GIMPS is an organized search for Mersenne prime numbers using provided free software. |
| Keywords | Marin Mersenne prime numbers GIMPS primenet prime95 |
| Content-Type | text/html; charset=utf-8 |
| Content-Language | en |
| Msapplication-config | none |
Cache-control no-store, no-cache, must-revalidate
Pragma no-cache
Content-type text/html; charset=utf-8
Content-encoding gzip
Expires Thu, 19 Nov 1981 08:52:00 GMT
Vary Accept-Encoding
Server Microsoft-IIS/10.0
X-powered-by PHP/7.4.33
Set-cookie GIMPSWWW=d7827aheor157fft878p6bjndv; expires=Sat, 19-Sep-2026 05:12:58 GMT; Max-Age=2592000; path=/; domain=mersenne.org; SameSite=Lax
Alt-svc h3=":443"; ma=86400; persist=1
Strict-transport-security max-age=31536000
Date Thu, 20 Aug 2026 05:12:58 GMT
Content-length 9132
